射流预冷不同因素对涡扇发动机性能的影响

王佳美; 郭迎清; 于华锋

doi:10.13224/j.cnki.jasp.20220127

射流预冷不同因素对涡扇发动机性能的影响

doi: 10.13224/j.cnki.jasp.20220127

西北工业大学动力与能源学院，西安 710072

基金项目: 国家科技重大专项基础研究项目（J2019-Ⅴ-0003）

详细信息

作者简介:
王佳美（1995-），女，博士生，主要从事发动机总体性能计算方面的研究。E-mail：wangjiamei@mail.nwpu.edu.cn

通讯作者:
郭迎清（1964-），男，教授，博士，主要从事发动机控制方面的研究。E-mail：yqguo@nwpu.edu.cn

中图分类号: V231.1
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- 文章访问数: 46
- HTML浏览量: 13
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- 被引次数: 0
出版历程
- 收稿日期: 2022-03-13
- 网络出版日期: 2023-08-16

Effects of different influencing factors under mass injection and pre-compressor cooling on turbofan engine performance

School of Power and Energy，Northwestern Polytechnical University，Xi’an 710072，China

摘要

摘要:
为了研究射流预冷下涡扇发动机的性能以及稳定性表现，分别考虑射流预冷导致的进气道掺混换热、截面工质热物理性质的修正以及部件特性修正这三种因素，对涡扇发动机的稳态性能进行了数值模拟。计算结果表明：射流预冷下发动机推力的大幅增长来自于进气流量的增加，其中掺混换热是引起进气流量增加的直接因素，而工质热物理性质和部件特性的变化则导致发动机的推力下降，高水气比下，受进气流量增加的影响，射流预冷仍能大范围的提高发动机的推力水平。进气道掺混换热使得风扇更为逼近喘振点，而随着水气比的增加，风扇和高压压气机的稳定性均有所回升。
- 射流预冷（MIPCC） /
- 掺混换热 /
- 工质热物理性质 /
- 部件特性 /
- 推力 /
- 喘振裕度
Abstract:
In order to study the performance and stability of turbofan engine under mass injection and pre-compressor cooling (MIPCC), the steady-state performance of turbofan engine was numerically simulated by considering three factors: inlet mixing heat exchange, modification of thermophysical properties of working fluid and modification of component characteristics. The calculation results showed that the thrust of engine under MIPCC greatly increased due to the increase of intake flow, in which the inlet mixing heat exchange is the direct factor contributing to the increase of intake flow, while the changes of thermophysical properties of working fluid and component characteristics lead to the decrease of the thrust of engine. Even if with high water-air ratio, the thrust level can still be greatly enhanced by intake flow. Inlet mixing heat exchange can make fan work closer to the surge point, however, with the increase of water-air ratio, the stability of fan and high-pressure compressor both rose.
- mass injection and pre-compressor cooling (MIPCC) /
- mixing heat exchange /
- thermophysical properties /
- component characteristics /
- thrust /
- surge margin

HTML

图 1 MIPCC结构示意图

Figure 1. Simplified structure of MIPCC device

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图 2 发动机飞行轨迹

Figure 2. Flight trajectory of engine

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图 3 考虑MIPCC不同因素时发动机主要性能参数响应

Figure 3. Response of engine main performance parameters considering different influencing factors of MIPCC

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图 4 考虑MIPCC不同因素时压缩部件参数响应

Figure 4. Response of compressor characteristics considering different influencing factors of MIPCC

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图 5 考虑MIPCC不同因素时喘振裕度响应

Figure 5. Response of surge margin considering different influencing factors of MIPCC

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图 6 不同预冷温度下的发动机参数响应

Figure 6. Response of engine parameters under different pre-cooling temperatures

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图 7 不同预冷温度下的喘振裕度响应

Figure 7. Response of surge margin under different pre-cooling temperatures

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