Numerical Study on the Performance of the Ventilation Cooling System for Helicopter Engine Nacelle in Hovering
The main objective of this work is to investigate, by means of numerical simulation, the performance of the engine nacelle ventilation cooling system of a helicopter in hovering, and to propose a simplified method of evaluating the ventilation cooling performance based on rotor downwash flow by taking the synthetical effect of the nacelle, exhaust ejector and downwash flow into consideration. Using the business CFD software, the influences of the turbulent model (for standard k-e model, k-ω model, SST model and RNG model), rotor downwash flow, engine heat dissipating capacity, inlet number (single inlet and double inlets), inlet size and inlet position (including single-inlet and double-inlets schemes, total up to six schemes) were analyzed on the flow field and temperature field of the nacelle and the performance of the exhaust ejector. The comparisons between flight test and numerical simulation results were completed. The results reveal that the method can exactly predict the performance of the nacelle. Overall, this study indicates that the calculation has the highest degree of accuracy using standard k-e model, and it has important impact of rotor downwash flow, engine heat dissipating capacity and inlet arrangement on the performance. The results can be regarded as reference for the design and optimization of the system.
helicopter engine nacelle numerical simulation temperature field downwash flow hovering
Xie Yongqi Gao Hongxia Zhang Yahai Chi Pengtao Yu Jianzu
School of Aeronautical Science and Engineering, Beihang University, Beijing 100191,China School of Aeronautical Science and Engineering, Beihang University,Beijing 100191, China Institute of Aircraft Design, Aharbin Aircraft Industry Group Co.LTD.,Heilongjiang Haerbin 150066, C School of Aeronautical Science and Engineering, Beihang University, Beijing 100191, China
国际会议
2010 Asia-Pacific International Symposium on Aerospace Technology(2010 亚太航空航天技术研讨会 APISAT 2010)
西安
英文
23-27
2010-09-01（万方平台首次上网日期，不代表论文的发表时间）