火箭推进

空气预冷器作为预冷组合循环发动机的关键部件之一,能够在极短的时间内对来流的高温空气进行冷却,预冷器的性能对预冷组合循环发动机的运行性能具有重要影响。因此,研制耐高温高压、高效紧凑且轻质的预冷器对预冷组合循环发动机的工程应用具有重要意义。针对一种复合印刷电路板预冷器,在5 Ma飞行工况和换热功率为422 MW时对其展开热力设计,并结合遗传算法对复合印刷电路板换热器进行结构优化。计算结果表明,优化后的复合印刷电路板换热器的体积功率比传统印刷电路板换热器的体积功率提高了93,比毛细管预冷器的体积功率提高了243。

As one of the key components in the precooling combined engine,the air precooler can cool the incoming high-temperature air at a very short time. The performance of the precooler has significant effect on the operating performance of the precooling engine. Therefore,the development of high temperature and high pressure resistant,efficient,compact and lightweight precooler is of great significance for the engineering application of the precooled engine. In this paper,a hybrid printed circuit heat exchanger is proposed. Under the operating condition at Mach 5 and the heat transfer rate of 422 MW,the thermal design is carried out,and the structure of the hybrid printed circuit heat exchanger is optimized combined with Genetic Algorithm. The calculation results show thatthe volume power of the optimized hybrid printed circuit heat exchanger is increased by 93 compared with that of the conventional printed circuit heat exchanger,and is increased by 243% compared with capillary tube precooler.

引言
1 复合印刷电路板换热器的热力设计及优化方法
2 复合印刷电路板换热器优化设计结果及讨论
3 结论

图1 佩刀发动机系统原理图<br/>Fig.1 Schematic of SABRE system

图1 佩刀发动机系统原理图
Fig.1 Schematic of SABRE system

图2 复合印刷电路板换热器芯体结构示意图<br/>Fig.2 Schematic diagram of hybrid printed circuit heat exchanger core

图2 复合印刷电路板换热器芯体结构示意图
Fig.2 Schematic diagram of hybrid printed circuit heat exchanger core

图3 高温空气侧换热板结构示意图<br/>Fig.3 Schematic diagram of heat transfer plate used for high temperature air

图3 高温空气侧换热板结构示意图
Fig.3 Schematic diagram of heat transfer plate used for high temperature air

图4 低温氦气侧换热板结构示意图<br/>Fig.4 Schematic diagram of heat transfer plate used for low temperature helium

图4 低温氦气侧换热板结构示意图
Fig.4 Schematic diagram of heat transfer plate used for low temperature helium

图5 基于复合印刷电路板换热器的预冷器结构示意图<br/>Fig.5 Schematic diagram of precooler based on hybrid printed circuit heat exchangers

图5 基于复合印刷电路板换热器的预冷器结构示意图
Fig.5 Schematic diagram of precooler based on hybrid printed circuit heat exchangers

表1 SABRE-3预冷器的设计工况参数<br/>Tab.1 Design parameters of SABRE-3 precooler

表1 SABRE-3预冷器的设计工况参数
Tab.1 Design parameters of SABRE-3 precooler

图6 预冷器分段热力设计流程图<br/>Fig.6 Flow chart of precooler's segmented thermal design

图6 预冷器分段热力设计流程图
Fig.6 Flow chart of precooler's segmented thermal design

图7 分段热力设计方法示意图<br/>Fig.7 Schematic diagram of segmented thermal design method

图7 分段热力设计方法示意图
Fig.7 Schematic diagram of segmented thermal design method

图8 分段数与芯体长度的关系<br/>Fig.8 Relationship between the number of segments and the length of the core

图8 分段数与芯体长度的关系
Fig.8 Relationship between the number of segments and the length of the core

表2 复合印刷电路板换热器单模块的热力设计结果<br/>Tab.2 Thermal design results of single module in hybrid printed circuit heat exchanger

表2 复合印刷电路板换热器单模块的热力设计结果
Tab.2 Thermal design results of single module in hybrid printed circuit heat exchanger

图9 芯体几何结构示意图<br/>Fig.9 Schematic diagram of core geometry

图9 芯体几何结构示意图
Fig.9 Schematic diagram of core geometry

表3 几何结构的约束条件<br/>Tab.3 Geometric constraints

表3 几何结构的约束条件
Tab.3 Geometric constraints

表4 复合型印刷电路板换热器结构参数优化前后对比<br/>Tab.4 Comparison of structural parameters before and after optimization for hybrid printed circuit heat exchanger

表4 复合型印刷电路板换热器结构参数优化前后对比
Tab.4 Comparison of structural parameters before and after optimization for hybrid printed circuit heat exchanger

表5 不同类型预冷器的性能对比<br/>Tab.5 Performance comparison of different types of precoolers

表5 不同类型预冷器的性能对比
Tab.5 Performance comparison of different types of precoolers

图10 优化前后空气侧和氦气侧沿程温度的变化<br/>Fig.10 Temperature distribution along air-side and helium-side streamwise directions before and after optimization

图10 优化前后空气侧和氦气侧沿程温度的变化
Fig.10 Temperature distribution along air-side and helium-side streamwise directions before and after optimization

图11 优化前后空气侧和氦气侧沿程压力的变化<br/>Fig.11 Pressure distribution along air-side and helium-side streamwise directions before and after optimization

图11 优化前后空气侧和氦气侧沿程压力的变化
Fig.11 Pressure distribution along air-side and helium-side streamwise directions before and after optimization

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备注

引言

1 复合印刷电路板换热器的热力设计及优化方法

2 复合印刷电路板换热器优化设计结果及讨论

3 结论

期刊信息