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385 articles for “Velocities”
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Evaluation of J-Integral and Fatigue Crack Growth Rate of Semi-elliptical Crack in Compressor Blade
Abstract: Gas turbine compressor blades are subjected to centrifugal, gas bending and vibratory loads. This repeated loading and unloading can reduce the life of compressor blades. This research aims at the estimation of fatigue crack growth rate of various three-dimensional cracks in a compressor blade considering the J-integral calculations for a semi-elliptical crack, subjected to centrifugal loading. Static stress analysis was carried out to ascertain the critical region or crack zone …
Published in Trends in Mechanical Engineering & Technology · Vol. 4, Issue 2, 2014 · pp. 39–46 Read article
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A Review on Deviation Function Method
Abstract: This review paper covers the method to develop a lobe rotor pair profile used in many mechanical mechanisms. Lobe rotor pairs are conjugate generated pairs. It means that for each lobe there exists a corresponding another lobe such that for each point on first lobe there is a point on another lobe having same velocity. Deviation function method is widely used to develop a lobe profile. Deviation function method is …
Published in Trends in Mechanical Engineering & Technology · Vol. 5, Issue 2, 2015 · pp. 28–33 Read article
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Evaluation of Test Performed on Suspension by the Use of ZnO as Blending Agent for Measurement of Mechanical Characteristics
Abstract: This paper entails about the analogy performed on the rear unit-spring loaded hydraulic damper. The focus is laid upon the measurement of mechanical properties when the suspension unit is preloaded. Dynamic load test rig is employed for the accurate and precise measurement of values generated during the test. The suspension unit is preloaded with some initial velocity and the corresponding values are being generated. ZnO as a blending agent along …
Published in Trends in Mechanical Engineering & Technology · Vol. 5, Issue 3, 2015 · pp. 33–37 Read article
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Numerical Simulation of Flow Field, Fountain Flow and Associated Noise in Supersonic Impinging Twin Jet using Large Eddy Simulation
Abstract: A three-dimensional flow field is produced by a supersonic twin-jet impingement. It is studied using the turbulence model Large Eddy Simulation (LES). The numerical model consists of two parallel jets of diameter 3D apart, which are issued from a plane which is at a distance H = 2D, 3D, 4D above the ground. The Nozzle Pressure Ratio (NPR) is kept at 3.7 for all the flow conditions. The study is …
Published in Journal of Aerospace Engineering & Technology · Vol. 4, Issue 3, 2014 · pp. 1–8 Read article
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Analytical Solution to Bi-Linear Spring Mass Systems Free Vibration
Abstract: Dynamic systems are generally categorized as linear and non-linear systems based on the analysis approaches developed. Bi-linear spring mass systems form an intermediate category which possesses characteristics of both linear and non-linear systems. Analytical solutions to bi-linear systems cannot in general be reduced to a single equation covering the entire motion domain as in the case of linear systems. Nevertheless, the step-wise linear solutions can be obtained within each domain …
Published in Journal of Aerospace Engineering & Technology · Vol. 8, Issue 1, 2018 · pp. 21–35 Read article
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Novel Thermal Management of BIPV System-Liquid Earth-Based Cooling
Abstract: The application of solar PV has tremendously increased in recent years owing to the improved efficiency and economic feasibility. Among the several applications of PV panels Building integrated photovoltaics has become a hot topic in research. However improper thermal management of solar panels is the main cause of a decline in efficiency and longevity. In this regard, water-based coolingsystems, integrating cooling ducts, using optical filters, phase change materials, and air-passed …
Published in Journal of Refrigeration, Air conditioning, Heating and ventilation · Vol. 10, Issue 2, 2023 · pp. 1–18 Read article
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Flow Simulation and Experimental Comparative Study of Aerodynamic Forces on NACA 2415 Airfoil Scaled Model
Abstract: Aerodynamic force, which would be brought upon by the relative motion of an object and the airflow, is the force that the air in which the body is submerged exerts on the body. The normal force resulting from force on the body's surface and the shear force resulting from airflow viscosity, also known as skin friction, are the two sources of aerodynamic force. Shear force is applied locally and parallel …
Published in Journal of Aerospace Engineering & Technology · Vol. 12, Issue 3, 2022 · pp. 33–54 Read article
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The Use of Allelopathic Extracts of the Resedues of Ceratophyllum demersum L. and Cuscuta trifolii Bab L. as Biocides for Some Jungles Associated with the Growth of Triticuma estivum L. in the Fields of Najaf Governorate
Abstract: This study was conducted to assess the inhibitory activity of the plants Ceratophyllum demersum L.. and Cuscutatrifolii Bab L. and Cyperus rotundus L. Water and alkhol extracts on germination and growth of Medicago hispida L., Sonchus oleraceus L . Seeds of the test plants were grown in Petridishes water-alkehol extracts at concentrations of )0%, 20%, 40%, 60% and 80%(.Plant extracts showed a significant reduction of germination percentage, velocity coefficient of …
Published in Research and Reviews : A Journal of Biotechnology · Vol. 13, Issue 1, 2023 · pp. 1–11 Read article
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Annotated Bibliography on Biomass Energy
Abstract: It is always of due concern regarding the consistent developing energy systems which involves that the final product requirements should be noted duly, hence this article focuses on the storehouse in a renewable energy system which does not have any usage of fuels such as fossils. It has been statistically estimated that the storage capacity increases efficiently when the factor of conversion losses is included. In the operation of power …
Published in Research and Reviews : A Journal of Life Sciences · Vol. 8, Issue 3, 2018 · pp. 91–96 Read article
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Stress and Deformation Analysis of Rotating Thick Truncated Conical Shells of Exponential FGM
Abstract: AbstractThe present study reports stress and deformation analysis of rotating thick truncated conical shells made of exponentially varying functionally graded material, subjected to linearly varying internal pressure. Material properties of the shells are graded exponentially along the axial direction. Metal-ceramic as well as ceramic-metal (FGM) of aluminum metal and zirconia ceramic is considered. The stresses and deformation behavior are evaluated at different surfaces along the radius and at different angular …
Published in Research & Reviews : Journal of Physics · Vol. 5, Issue 2, 2016 · pp. 36–44 Read article
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Analytical Approach to Determine Basic Dimension of Simplified Rocket Engine
Abstract: As any common Rocket Engine liquid rocket engine, the following Rocket Engine uses liquid Oxygen and Gasoline as propellants. Inside the combustion chamber the liquid Oxygen reacts chemically with gasoline continuously once spark is given to incite reaction that produces hot gases which accelerated and ejected at high velocity through a nozzle. The thrust developed by Engine is transferred to the structure and propel the whole rocket. Since Engine is …
Published in Research & Reviews : Journal of Space Science & Technology · Vol. 3, Issue 3, 2014 · pp. 1–9 Read article
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Shock Response Spectrum and Its Damage Potential: An Application to Launch Vehicle Structures
Abstract: The present work briefly summarizes the analysis of pyrotechnic shocks encountered in launch vehicle structures using the shock response spectrum (SRS) and the pseudo velocity shock response spectrum techniques. The mathematical idealization assumes a single degree of freedom (SDOF) system model with base excitation. The mounting elements of SDOF system are assumed to be flexible and each mounting element can be described by its stiffness and damping parameters. The convolution …
Published in Research & Reviews : Journal of Space Science & Technology · Vol. 1, Issue 1-3, 2012 · pp. 67–80 Read article
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Computer Simulations on Magnetic Particles Capturing in an Implant Assisted Channel for Targeted Drug Delivery
Abstract: In this paper, we studied the effect of magnetic field, inlet velocity and particle size on capture efficiency of magnetic particles transported in an implant assisted uniform channel through computational simulations. The dominant magnetic and drag forces are included in the simulations. The couple nonlinear Navier-Stokes equation for fluid flow and Newton’s second law equation for particle transport are solved using finite element based COMSOL multiphysics software. It is found …
Published in Trends in Drug Delivery · Vol. 2, Issue 2, 2015 · pp. 1–7 Read article
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Characterization of Strength of Aluminum (Al 6063-T6) After Corrosion
Abstract: Aluminum are frequently used as light weight structure in various nautical design. One of them is the ship structure design where sever environment of saline water influences the damage of the structure and one among them is pitting. In this paper, an experimental verification of strength and impact of corrosion effect on Al-6063–T6 aluminum was presented. The specimens were exposed to saline water for various duration like 500 hrs, 750 …
Published in Journal of Experimental & Applied Mechanics · Vol. 13, Issue 4, 2022 · pp. 48–61 Read article
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Control System Operational Protocol for Dual DC Electric Motor Configuration in Electric Vehicles
Abstract: This paper is focused on the analysis of the performance of DC electric motor for electric vehicles (EV) in urban and intercity routes. The paper analyzes the different driving conditions in both types of routes reproducing the most current situations and how they influence the electric motor performance. The study is focused on a dual electric motor configuration, series and parallel, which equips an electric vehicle prototype, evaluating the power …
Published in Journal of Mechatronics and Automation · Vol. 8, Issue 3, 2021 · pp. 1–14 Read article
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Experimental Analysis of Cutting Forces Under Different Machining Parameters and Carbide Inserts During Turning of Hardened AISI 4340 Steel
Abstract: Turning of hardened materials with an advanced coated carbide insert has numerous advantages over the grinding process, e.g., reduced process cost, high material removal rate, and less environmental concern due to the elimination of the cutting fluid. Process parameters in conventional machining operations like cutting speed, feed, and depth of cut play the most crucial role behind the generation of heat which also leads to microstructural changes, improved tool life, …
Published in Journal of Polymer & Composites · Vol. 11, Issue 14, 2023 Read article
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Minimum Energy Criteria for Machining to Determine Energy-Productivity Relationship
Abstract: In this research segment, cutting rates were changed while depth of cut and feed rate remained fixed. The results of cutting using a standard uncoated carbide insert were compared. Cutting speeds were maintained at a constant. After determining the optimal cutting condition for the equipment and material. To determine optimal tool life and cutting speed, turning operations were performed. In industrial cutting operations, flank wear reduces tool life. For single-point, …
Published in Journal of Polymer & Composites · Vol. 11, Issue 4, 2023 · pp. 81–94 Read article
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Tracking Subsystem in Satellite
Abstract: The central nervous system and operating system of all satellite and spacecraft missions is called Satellite Telemetry, Tracking and Control (STT&C). Ground controllers can keep an eye on and manage the spacecraft's position, velocity, and location thanks to the tracking subsystem of the satellite. A key component of satellite TV for PC operations is tracking, which makes sure that satellites maintain their precise orbits and the right attitude to complete …
Published in International Journal of Satellite Remote Sensing · Vol. 1, Issue 1, 2023 · pp. 36–42 Read article
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Evaluation of Fly Ash/ZrO2 Reinforced AZ91E Hybrid Composites Based on Wear and Friction Characteristics
Abstract: In the current study the compo-casting Al alloy MMCs' wear resistance was examined under a variety of abrasive circumstances, including coefficient friction, wear rate and it’s sliding distance. The AZ91E matrix composite was made by the liquid metallurgy process and reinforced with aluminum plated zirconium dioxide (ZrO2) particles. Designers examined the characteristics of matrix alloys along with created composites. friction and wear from dry sliding experiments had been performed on …
Published in Journal of Polymer & Composites · Vol. 11, Issue 8, 2023 · pp. 324–338 Read article
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Empowering Concrete: Enhancing Strength and Durability with Coal Bottom Ash
Abstract: The utilization of coal bottom ash, an industrial waste byproduct, as a sustainable alternative to river sand in concrete production has gained increasing attention due to environmental concerns and the need for resource optimization. This study examines how incorporating coal bottom ash into concrete mixtures, either partially or entirely replacing river sands, affects different properties. These properties include the workability of fresh concrete, as well as its compressive strength, splitting …
Published in Recent Trends in Civil Engineering & Technology · Vol. 14, Issue 1, 2024 Read article