| 高扬，李密，高磊.基于相似原理的风车状态进口空气流量和内阻力估算方法[J].航空发动机,2018,44(2):98-102 |
| 基于相似原理的风车状态进口空气流量和内阻力估算方法 |
| Estimation Method of Windmilling Inlet Air Flow and Internal Drag Based on Similarity Principle |
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| DOI： |
| 中文关键词: 风车流量函数 空气流量 内阻力 最大单位推力 点火系数 涡喷/ 涡扇发动机 |
| 英文关键词:windwilling flow function air flow internal drag maximum specific thrust lighting parameter turbojet/turbofan engine |
| 基金项目:国家自然科学基金（51275024）资助 |
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| 中文摘要: |
| 风车状态进口流量和内阻力是试飞安全评估中必须获取的重要信息。为评估燃烧室空中复燃能力和风车状态下飞机阻
力，在1 维管流理论基础上，结合流量连续原理，介绍了1 种通过直接测量尾喷管出口马赫数、间接获取空气流量和内阻力的测量
方案，并根据相似原理，将其推广应用至不同几何的发动机，发展了1 种不依赖发动机部件特性，且适用于不同几何结构的涡喷/
涡扇发动机通用的风车状态空气流量和内阻力估算方法。最后以GE 公司的CF34-10A 发动机为例，对其风车状态下的进口空气流
量和内阻力进行了估算，估算结果与GE 公司提供的风车状态数据吻合，满足工程需求。该方法对多发飞机起飞、爬升、着陆以及巡
航阶段单发失效时的飞机阻力性能估算和风车起动研究具有重要意义 |
| 英文摘要: |
| The inlet air flow and internal drag under windmilling conditions are key information that should be achieved in safety
evaluation of flight test. To estimate combustion chamber relight capability and engine drag under windmilling conditions, an measurement
scheme was introduced that the windmilling air flow and internal drag can be obtained indirectly through the measurement of mach number
at nozzle exit based on one-dimensional ducted flow and continuity theory. According to the similarity principle, the method was applied on
different geometry engines. An estimation method was developed, which was independence on engine component characteristics, and was
applied on estimating the windmilling drag and air flow of turbojet and turbofan engines in different geometries. At last, taking the GE
CF34-10A as an example, the windmilling inlet air flow and internal drag were estimated. The investigation results are in good agreement
with the GE test data, which meet the engineering requirement. It has important significance for estimating the assessment of aircraft drag
performance and windmilling start with one or more engines inoperative during take-off, climb, landing, and cruise conditions. |
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