Title: Analysis of Transonic Flow over an Airfoil NACA0015 using CFD
Author(s): Iman Jabbar Ooda, Kareem Jawad Kadhim, Abdnoor Jameel Shaheed
Pages: 1-8 Paper ID: 210301-8484-IJMME-IJENS Published: February, 2021
Abstract: The transonic flow has been studied in this paper which is one of the most difficult types of flow because it is an internal flow from the subsonic flow and supersonic flow which shock waves penetrate it. The difficulty in predicting of the behavior of this type of flow includes the non-linear equations which cannot be solved mathematically. The aerodynamic characteristics of NACA 0015airfoil such as lift Coefficient, drag Coefficient, pressure coefficient and wall shear stress in transonic regime have been analyzed and predicted using Ansys-Fluent (14.5) at different velocities in the Transonic range (M_∞ = 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2) at =2.5°.The Transonic Compressible flow simulation has been done using k-ω shear stress transport (SST) turbulence model. The calculations show that The lift coefficient decreases and the drag coefficient increases due to the formation of shock wave behind the supersonic airfoil flow areas, which typically begin to appear at (M_∞= 0.7) and the effect of wall shear stress becomes more significant on the leading edge and on the middle of the airfoil as M∞ increases. The theoretical results were compared with previous published results of experimental work and good agreement was obtained.
Keywords: Airfoil, NACA0015, Mach No., transonic flow.
Full Text (.pdf)  International Journals Of Engineering and Science | 1,329 KB
Title: Finite Element Analysis, Control and Simulation of a Novel 3D Hybrid Balanced Manipulator
Author(s): Ahmed Sameh, Mohamed Fanni, Abdelfatah M. Mohamed
Pages: 9-19 Paper ID: 210401-5757-IJMME-IJENS Published: February, 2021
Abstract: This paper presents a novel 3D hybrid balanced manipulator whose end-effector can move in the 3D space with three translational degrees of freedom without changing the orientation. The proposed industrial manipulator uses only rotary joints and actuators with a structure gathering the characteristics of parallel and serial manipulators. The proposed manipulator uses only rotary actuators due to their cheaper cost, smaller installation size and better reliability compared with linear actuators. The manipulator description, kinematic analysis, mechanical design, finite element analysis and controller design are presented in this work. A simulation of pick & place process is also discussed to validate the efficiency of the proposed manipulator to accomplish various industrial tasks.
Keywords: Hybrid robot; Translational motion; Rotary actuators; Kinematic analysis; Pick and place.
Full Text (.pdf)  International Journals Of Engineering and Science | 1,960 KB
Title: Comparison of Conventional Solar Still with Addition of Water Cooling to Glass Cover
Author(s): Yogie P. Sibagariang, William, Himsar Ambarita
Pages: 20-27 Paper ID: 210601-5757-IJMME-IJENS Published: February, 2021
Abstract: Solar still is a simple method for producing clean and inexpensive water. This study aims to identify the performance of conventional dual slope solar still and dual tilt solar still with water cooling on the outer glass cover (modification). This water cooler is used to speed up the condensation process on the surface of the inner glass cover. The condition of the study is in accordance with the location in the city of Medan (3,430LU dan 98,440BB). The experiment was carried out for 3 consecutive days by comparing the two systems on the same day. It was found that the use of water coolers on the outer glass cover causes a decrease in temperature in the basin, but can increase the productivity of clean water up to 50%.
Keywords: Solar Still; Double Slope; Water Cooling;
Full Text (.pdf)  International Journals Of Engineering and Science | 739 KB
Title: Simulation of Cold-Energy Storage Distribution Temperature Using Phase-Change Material
Author(s): Samar, Heru Leonardo, Himsar Ambarita
Pages: 28-31 Paper ID: 210101-4646-IJMME-IJENS Published: February, 2021
Abstract: One of the most advanced technologies for increasing the performance of processes of energy conversion and the efficient use of available heat sources is thermal energy storage. The present work is comparing the temperature distribution in cold energy storage using PCM frizjel and PCM water. The test begins by inserting the assembled PCM into the container provided then the container inserted into Styrofoam arranged to coat the inside of Styrofoam. Then enter the iron frame that has been installed with a temperature sensor from the Arduino microcontroller to obtain temperature and humidity data in Styrofoam. After that, the Arduino microcontroller reads the temperature and humidity of the air for a set time, the microsd is removed and read in Microsoft Excel on a computer. Simulation results show that the temperature of PCM Frizjel can maintain room temperature more evenly than Water PCM. Temperature comparison of PCM Frizjel and PCM Air in cold energy storage has relatively the same characteristics. Temperature ratio on the walls of the Styrofoam box has insignificant temperature differences and has the same characteristic tendencies. By looking at these results, the use of PCM as cold energy storage in cold storage is worth considering, as a backup or even as a replacement for the drugs and food storage system that has been used so far.
Keywords: cooling system; cold-energy storage; phase-change material; MATLAB; data analysis
Full Text (.pdf)  International Journals Of Engineering and Science | 739 KB
Title: Optimization of Fracture Toughness of Reinforced Rubber Using Taguchi Method
Author(s): Amr A. Ali, Samy El-Abden., Sayed T. Mohamed
Pages: 32-41 Paper ID: 212401-3737-IJMME-IJENS Published: February, 2021
Abstract: Reinforced rubber behaviors as composite material in fracture behave like Quasi-brittle material which are in between ductile and brittle, therefore, it need special treatment in measuring the fracture properties. The fracture toughness of rubber is of great intense especially in belt conveyers field, therefore, it is affected by a lot of parameter such as environmental condition, mechanical loading, and moreover specimen geometric parameter. The fracture toughness of commercial reinforced rubber (2 ply, 3 ply and 4 ply) has been measured by the essential work of fracture (EWF) method using double-edge notch tension specimen. The essential work of fracture is performed at room temperature with 2 mm/min deformation speed. A basic of EWF and the relation with J-integral have been described. The ligament yielding is observed at maximum point of load-displacement curve, and then necking and tearing process occur at a softening region. The essential work of fracture for the reinforced rubber sheet is influenced by many geometric parameters. These geometric parameters are selected as; Ligament length, number of reinforcement plies, loading direction, crack tip radius and length to width ratio. Effect of these parameters are related using optimization technique using Taguchi method to obtain the optimal specimen geometric shape which corresponding to maximum fracture toughness. Experimental results for all S/N ratio, mean, and standard deviation (real) response values show that, loading direction, height to width ratio, crack tip radius, ligament length, and number of reinforcement plies are the significant parameters among all controllable factors that influence the fracture toughness. Optimum levels recommended obtaining better fracture toughness based on S/N ratio, for the specific range are loading direction (90 deg.), high level of height to width ratio (3:1), low level of crack tip radius (0 mm), high level of ligament length (12 mm), and high level of number of reinforcement plies (3 ply). Optimum levels recommended obtaining better fracture toughness based on both mean and standard deviation values, for the specific range are loading direction (90 deg.), high level of height to width ratio (3:1), low level of crack tip radius (0 mm), high level of ligament length (12 mm), and medium level of number of reinforcement plies (2 ply).
Keywords: Belt conveyer- Fracture toughness, Woven fabric, Taguchi optimizations.
Full Text (.pdf)  International Journals Of Engineering and Science | 884 KB
Title: An Evaluation of Deep Neural Network Models on Short-Term Energy Consumption Forecasting for Smart Home Management System
Author(s): Syed Nazir, Azlan Abd Aziz, Jakir Hossen, Jaya Ganesan, Nor Azlina Aziz, G. Ramana Murthy
Pages: 42-47 Paper ID: 210801-7979-IJMME-IJENS Published: February, 2021
Abstract: The smart home Electricity Management System (EMS) enables users to obtain crucial information about the entire household electricity consumption. In this paper, a similar smart home EMS named beLyfe developed by Telecom Malaysia (TM) has been used in which we intend to forecast a day ahead of hourly electricity consumption time-series data. The short-term electricity consumption time-series data forecasting is complex due to the non-linear form of data, recently the Deep Neural Network (DNN) models have gained considerable attention to perform this task. This study aims to determine an effective DNN model for forecasting our (EMS) hourly data by evaluating four popular DNN models such as the Convolutional Neural Network (CNN), the Long Short Term Network (LSTM), the hybrid CNN-LSTM, and the Multilayer Perceptron (MLP). The significant hyper-parameters, such as filter size, neuron size, and optimizer algorithm, has been determined through hyper-parameter tuning and performed a comparison experiment between each of these model on four different week sample datasets. The evolutionary experimental results indicate that the 1-D CNN model outperformed the remaining models concerning prediction accuracy and computational training complexity.
Keywords: 1-D Convolutional Neural Network, Electricity Management System (EMS), Time-Series Data
Full Text (.pdf)  International Journals Of Engineering and Science | 918 KB
Title: Noise and Vibrations Reduction of Stone Cutting Factories
Author(s): Ahmed Abu Hanieh, Ahmad Al Balasie
Pages: 48-63 Paper ID: 213001-4545-IJMME-IJENS Published: February, 2021
Abstract: This research handles the problem of noise pollution caused by the stone cutting processes in the medium and small factories located close to the populated areas. Noise can be reduced by two main ways: the first method is done by adding sound absorbers to the workshop surrounding walls; the second technique is by building a barrier wall in front of the open facade of the factory. This paper introduces three techniques to reduce the vibration in the stone cutting machine knowing that vibration is the main source of noise, the techniques are: inserting a passive elastomeric rubber pad, designing an active controller based on Integral Force Feedback (IFF), and designing a regulator based on Linear Quadratic Regulator (LQR) for active control of vibrations. Simulation results show the ability of these techniques to regulate the vibrations at various levels.
Keywords: stone cutting; noise reduction; sound pressure level; sound absorber; LQR; IFF.
Full Text (.pdf)  International Journals Of Engineering and Science | 1,238 KB
Title: A Comparative Study of Performances Between the Sliding Modes and the Trust Control Strategies for an Articulated Robotic Arm Position Control
Author(s): Nadjet Zioui, Aicha Mahmoudi, Yousra Mahmoudi, Abdelmounaam Rezgui
Pages: 64-73 Paper ID: 213301-9696-IJMME-IJENS Published: February, 2021
Abstract: Two robust control techniques are presented and applied to a SCARA robotic arm in order to analyze the performances in terms of precision and quality of the control signals. The first controller is the very well known sliding modes (SM) based controller. It has been applied successfully so far in various applications. Its main drawbacks is certainly the Shattering phenomenon and the high energy of the control signals deployed to overcome the modelling and measurement errors. The second controller is a brand new controller called the trust control. The trust controller is based on the Dempster-Shafer belief theory concepts. Its robustness with regard to the measurement and modelling errors is mainly due to the use of the trust allocated to the information sources (measurements and estimations) rather than the direct use of the data itself (possibly incorrect) in the control strategy computation. Simulations have been carried out, they underline the robustness of the trust controller and its higher precision and less energetic control signals, with comparison to the SM controller.
Keywords: Articulated robotic arm, Robust control, Sliding modes, Belief theory, Trust control.
Full Text (.pdf)  International Journals Of Engineering and Science | 831 KB
Title: Numerical Simulation of Pump Suction Elbow with Various Geometry: A Case Study
Author(s): Mohamed Adel
Pages: 74-87 Paper ID: 211501-7676-IJMME-IJENS Published: February, 2021
Abstract: This paper presents a numerical simulation of a pump suction elbow with various geometric shapes to investigate the temporal velocity variations and swirl flow. A comparative study of different pump suction geometries was performed. There are four different geometric shapes: Short Radius Elbow (SRE), Long Radius Elbow (LRE), Short Radius Elbow followed by Concentric Reducer (SRECR), and Short Radius Elbow followed by Short Straight Pipe (SRESP) were investigated. A 3-D numerical analysis was performed using ANSYS 16. The k-ϵ model is used to simulate the effect of turbulence through the flow. The numerical simulation of the flow field through the pump suction was studied with different geometries on different Reynolds number. The velocity distribution and streamlines is obtained for various geometric shapes. The results showed that SRECR and SRESP enhanced the velocity distribution at the pump suction. Consequently, the velocity instabilities are reduced. Hence, speed instability is reduced. Also, SRESP is found to be the best arrangement because the velocity distribution upon pump suction is roughly equal.
Keywords: Pump suction, CFD, Simulation, Suction elbow, End suction pump and Velocity distribution.
Full Text (.pdf)  International Journals Of Engineering and Science | 993 KB
Title: Experimental and Statistical Optimization Of Wire-EDM For Hipped (HIP) Udimet700
Author(s): Sara A. El-Bahloul, Rania Mostafa
Pages: 88-95 Paper ID: 213401-5757-IJMME-IJENS Published: February, 2021
Abstract: The materials development along with the requirement of high precision machining have contributed significantly to the research investigation on Wire Electrical Discharge Machining (Wire-EDM) of Udimet700, a Nickel-Based Superalloy. This research investigates an experimental procedure beginning with Udimet700 fabrication by Powder Metallurgy-Hot Isostatic Pressing (PM-HIP) followed by a Non-traditional machining process, Wire-EDM. Five machining parameters namely, Spark on-time, Spark off-time, Pulse Current, Pulse Voltage, and Wire Speed are studied to identify their effects on the resultant Material Removal Rate (MRR), Surface Roughness (SR), and Vickers Micro-Hardness (VHN). Single and multi-response optimizations are performed based on a Taguchi-based Grey relational analysis (GRA) technique. The optimal machining constraints combination to achieve the best multi-response optimization is (40 µsec) spark on-time, (5 µsec) spark off-time, (5 A) pulse current, and setting the wire speed and pulse voltage into 2 and low, respectively. In order to verify the results of the analysis, the reliability progress of the responses is forecast and reviewed, and good alignment is achieved. The experimental and expected findings confirm the validity of the Taguchi-based GRA for enhancing the WEDM of Udimet700 nickel-base superalloy.
Keywords: Wire-EDM; Hot Isostatic Pressing; Udimet700; machining constraints; Single response; Multi-response
Full Text (.pdf)  International Journals Of Engineering and Science | 1,920 KB
Title: Ant Colony Algorithm Improvement for Robot Arm Path Planning Optimization Based on D* Strategy
Author(s): Ahmed T. Sadiq, Firas A. Raheem, Noor Alhuda F. Abbas
Pages: 96-111 Paper ID: 213101-8484-IJMME-IJENS Published: February, 2021
Abstract: The rapid expansion in the industrial revolution has been aroused to utilize of the robot arm in various high accuracy and productivity applications. For guiding the robot arm accurately, the path planning has been upgraded to optimize the robot arm movement. In this paper, 2-DOF robot navigation is analyzed and the free Cartesian spaces are constructed for detecting the free space that guarantee a collision-free path planning accordingly. The modified Ant Colony Optimization algorithm is proposed to obtain the optimal path planning that fulfils the aims of motion. The essential function of modified ACO algorithm is to generate an optimal path depending on the exact distance of D* algorithm. Fifth-order polynomial equations is applied to generate a smooth trajectory from initial to goal configurations. The observed detailed results of proposed implementation demonstrates the accuracy and efficiency of proposed method performance in achieving the optimal path and trajectory.
Keywords: Two-Link Robot Arm; Trajectory Planning; ACO; Free Cartesian Space; D*.
Full Text (.pdf)  International Journals Of Engineering and Science | 2,465 KB
Title: Automated Small Intestine Bleeding Detection Using Wireless Capusle Endocscopy Images
Author(s): Athira Ajay, Sathish Kumar Selvaperumal, Thang Ka Fei, Yvette Shaan-Li-Susiapan
Pages: 112-117 Paper ID: 211401-8383-IJMME-IJENS Published: February, 2021
Abstract: In this paper, an efficient automated detection of small intestine bleeding using Neural Networks is proposed. The pre-processing techniques used for the raw images include grayscale, negative, brighten, median filtering, Gaussian filtering, morphological, edge detection and thresholding. The main features extracted from the images are Color Normalization, Contrast Enhancement, Cross-correlation, Convolution Neural Networks (CNN) Layers, Back–Propagation, and Pooling Layer. Convolution Neural Network resent-50 is used to extract the features, predict and classify into bleeding and non-bleeding. A GUI is developed to demonstrate the proposed system using MATLAB. This system obtained 98.6% of average accuracy with CNN resnet-50 with 6 features only, as compared with CNN Goglenet, Alexnet and Softmax.
Keywords: small intestine, bleeding, CNN
Full Text (.pdf)  International Journals Of Engineering and Science | 557 KB