Numerical Simulation And Analysis Of Aerodynamics Of High-altitude Air Intake Conditions For One Turboshaft Engine

With the development of aircraft engine,flight altitude and flight velocity is higher and higher.To the engine test equipment,high altitude simulation test device,in particular,more stringent requirements are put forward.Compared with the flight test platform,high altitude simulation test device has high safety,complete test parameter,cost-effectiveness than high,and the advantages of short test period,The nations of the world are developing their own high altitude simulation test equipment.This paper details the high altitude simulation test device of a vortex axis engine structure and working principle.Uneven temperature phenomena in the air intake for one turboshaft engine will sometimes appear during tests,which could lead to inaccurate performance of the experimental engine.This paper mainly introduces the improved designs for the air inlet which is exclusive for a certain turboshaft engine in starter disciplinary test-bed.An inlet volute was added to let engine absorb air from the above of the dynamometer cover in order to avoid the heat dispersion area.Three-dimensional simulating verification for aerodynamic characteristics of the improved air inlet is performed and the flow field is calculated and analyzed by CFX.The results show that the improved air inlet meets the design requirements.Basin of the improved inlet guide,can effectively improve the engine altitude test of vortex axis inlet temperature field uneven phenomenon,which make the real temperature of the air intake of engine test and control system of measuring temperature closer to,is conducive to accurately measure the performance of the engine under different temperature.