in this study it has been tried, to compare results and convergence rate of sensitivity analysis and conjugate gradient algorithms to reduce fuel consumption and increasing engine performance by optimizing the timing of opening and closing valves in xu7/l3 engine. in this study, considering the strength and accuracy of simulation gt-power software in researches on the internal combustion engine...

The paper describes the design and test of a prototype active noise controller for a semienclosed cabin inside a turbo-prop aircraft. Here, the eight active noise control loudspeakers and sixteen microphones are mounted at the cabin walls and ceiling. For the development process, an acoustical mock-up is built to reproduce the acoustic situation inside the aircraft on the ground. The acoustic r...

Abstract We present a CFD analysis of wind tunnel model the new laminar turbo-prop aircraft designed in frame European Clean Sky 2 programme. The work presents numerical results aerodynamic performance scaled innovative turboprop A/C wing by using approach that includes transition prediction. Numerical will be compared considering two different procedures: a) analyses which location is imposed ...

Harvester ants (Messor galla Forel) defied various control strategies. Two field experiments were conducted to evaluate the effects of Spent Engine-Oil and other nature-based materials on their emergence in Maiduguri, Borno State of Nigeria. The treatments evaluated are spot application of spent engine-oil and some natural materials in experiment 1 and individual and equal mixture of Pure Neem ...

Abstract The FUTPRINT50 project is focused on designing and preparing ground for a hybrid-electric regional aircraft with capacity of 50 passengers. designed entry-into-service between 2035 2040. To evaluate refine the design concepts, will use two different reference aircraft: one that state-of-the-art, another extrapolated to represent what year 2040 model might look like. ATR 42-500, 50-seat...

Nowadays, due to the increasing power of diesel engines, especially heavy duty diesel engines, and increasing gas pressure inside the combustion chamber, the forces acting on the engine bearings have dramatically raised. On the other hand, becaus eof the competition in the market, it is necessary to increase the engine bearing life and reduce its failure as much as possible. The engine bearings...

  Wolfram|Alpha Computational Knowledge Engine software, despite all internet search engines, tries to provide the the best answer for a question or compute an equation in the most correct way based on the current knowledge. Therefore, given the unique characteristic of Wolfram|Alpha and its vast applications, the aim of the present article is to familiarize the biomedical scientists with...

experiments were conducted to evaluate the performance of a low heat rejection (lhr) diesel engine. performance parameters and emission levels were determined at various magnitudes of brake mean effective pressure. combustion characteristics of the engine were measured with tdc (top dead centre) encoder, pressure transducer, console and special pressure-crank angle software package at peak load...