直升机座舱空气分配管路系统设计及仿真

为保证座舱内合适的空气参数条件，实现制冷、加温和通风换气，满足全飞行包线下的指标需求，本文基于某型直升机座舱布局，开展了座舱空气分配管路系统设计及仿真研究。通过需求分析，明确设计技术指标。详细设计了座舱空气分配管路系统布局方案，并计算了供气口及分配管路尺寸参数。基于Flowmaster软件平台，建立了管路系统仿真模型，利用流量配平仿真计算，实现了管路系统的流量分配。通过与试验数据对比，供气口流量分配误差满足工程要求，验证了仿真结果的可靠性和系统方案的可行性。最后，针对直升机全飞行包线范围内管网风阻和供风口流量的变化，对技术指标进行了仿真计算校核。结果表明，所设计座舱空气分配管路系统方案合理可行，满足设计指标要求。

Design and Simulation of Helicopter Air Distribution System

In order to ensure appropriate air parameter conditions in the cabin, realize refrigeration, heating and ventilation, and meet the index requirements under the full flight envelope, based on the cabin layout of a helicopter, the design and simulation of cabin air distribution pipeline system are carried out in this paper. Clear the design technical indicators through demand analysis. The layout scheme of cabin air distribution pipeline system is designed in detail, and the size parameters of air supply port and distribution pipeline are calculated. Based on the Flowmaster software platform, a piping system simulation model was established, and the flow distribution of the piping system was realized by using the flow balance simulation calculation. Compared with the test data, the flow distribution error of the gas supply port meets the engineering requirements, and the reliability of the simulation results and the feasibility of the system scheme are verified. Finally, in view of the changes in the wind resistance of the pipe network and the air supply outlet flow within the full flight envelope of the helicopter, the technical indicators were simulated and checked. The results show that the designed cabin air distribution piping system scheme is reasonable and feasible, and meets the design index requirements.