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Good flow field characteristic is the basis of the test bed function in the engineering design of indoor aviation engine test bed. In this study, the flow field of the test room is analyzed by 3D computational fluid dynamic (CFD) method compared with the test results to improve the layout of the test bed. The study found that the numerical simulation can directly reflect the test condition and the...
Boundary Layer Ingestion (BLI) effects are the new and special issues caused by the in-depth integration of airframe and propulsion system. Based on a mathematical model of the distributed propulsion system and a sliced CFD model of SAX-40, this paper presents a detailed numerical research on the BLI effects of distributed propulsion configuration. The influence regularities of BLI on aerodynamic...
Improving the biogas engine performance by implementing the pressurised turbulent flow is discussed in this paper. The pressurised flow will increase volume of the fuel; hence improve the volumetric efficiency and the turbulence will increase the homogeneity of mixture; hence improve the flame speed. It is also known that the inlet port design and the intake manifold configuration have a direct influence...
Engine cooling system is crucial to maintain working temperature of vehicles' engine. The two main heat transfer fluids in typical cooling system are coolant and air. Under hood air flow when approaching radiator is highly non-uniform, thus 3D computational fluid dynamics is required to estimate air mass flow rates. While coolant circuit consists of numerous components, 1D thermal-fluid simulation...
The flow fields of a blockerless thrust reverser model were studied using computational fluid dynamic (CFD). The numerical simulations were performed with the bypass ratio of 9. The effects of cascade flow ratio and the injection flow ratio with variation of injection parameters at different fan nozzle pressure ratio (FNPR) were studied. According to detailed analysis of the thrust reverser flow characteristics,...
The Solar energy is renewable energy resources which is available in plenty in our country. So far many research works is carried out in the field of solar energy like solar ponds, solar cells, solar heaters, solar chimney etc. There are many effective methods to tap the solar energy. Solar chimney power generation is one of the latest methods of producing high energy output from sun. In solar chimney...
Pulse detonation engines (PDE) have received significant attention in recent years due to their potential advantages over conventional propulsion systems, including high thermodynamics cycle efficiency, high thrust/weight and specific impulse. The fuel-air injection and mixing is one of important research issues. To optimize the fuel-air injection and mixing, a three-dimensional computation model...
Compressors for modern gas turbine engines are challenging to simulate. Disparate length and time scales exist in an aggressive adverse pressure gradient environment amongst a wide array of physical phenomena requiring refinement in both space and time. The resulting mesh sizes and CPU time required to complete time-accurate simulations have become staggering, though they will only continue to increase...
In the present study the air/fuel mixing in the EV17 burner exit used in the GT13E2 turbine was investigated by means Computational Fluid Dynamics (CFD). The objective of the study was to determine the air/fuel mixing in the original burner design (reference case), investigate the air/fuel mixing with modified premix hole pattern (different impulse ratio and number of holes and recommend a hole pattern...
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