Micromanufacturing technologies of compact heat exchangers for hypersonic precooled airbreathing propulsion: A review

作     者：Bao MENG Min WAN Rui ZHAO Zhengping ZOU Huoxing LIU Bao MENG;Min WAN;Rui ZHAO;Zhengping ZOU;Huoxing LIU

作者机构：School of Mechanical Engineering and AutomationBeihang UniversityBeijing 100191China School of Energy and Power EngineeringBeihang UniversityBeijing 100191China 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2021年第34卷第2期

页      面：79-103页

核心收录：

学科分类：082502[工学-航空宇航推进理论与工程] 08[工学] 0825[工学-航空宇航科学与技术] 

基　　金：the funding support to this research from the National Natural Science Foundation of China (Nos. 51635005, 51975031 and 51605018) Defense Industrial Technology Development Program of China (No.JCKY2018601C207) 

主　　题：Compact heat exchangers Hypersonic precooled engine Microchannels Micromanufacturing Microtube 

摘      要：The Hypersonic Precooled Combined Cycle Engine(HPCCE), which introduces precooler into traditional hypersonic engine, is regarded as the most promising propulsion system for realizing a single-stage-to-orbit vehicle. The unique demands lead to the application of the compact heat exchangers, which can realize high thrust-to-weight ratio, sufficient specific impulse and high compression ratio. However, it is challenging to accurately manufacture the compact heat exchanger due to its extremely high heat dissipation capacity, remarkable compactness, superior adaptability and harsh operating condition. This review summarizes the precooling schemes of combined cycle propulsions and describes the demands and key issues in the fabrication of a compact heat exchanger for HPCCE. The investigation focuses on the application of various micromanufacturing methods of heat exchangers constructed from tubes of less than 1 mm in diameter and microchannels of less than 200 micrometers. Various micromanufacturing processes, which include microforming, micromachining, stereolithography, chemical etching, 3 D printing, joining and other advanced microfabricating processes, were reviewed. In addition, the technologies are compared in terms of dimensional tolerance, material compatibility, and process applicability. Furthermore, the boundaries of the micromanufacturing constraints are specified as references for the design of compact heat exchangers. Ultimately, the technological difficulties and development trends are discussed for the fabrication of compact heat exchangers for HPCCE.