液氢温区冷氦增压试验系统的设计

针对液体火箭冷氦增压系统试验研究的不足，设计并建设了液氢温区冷氦增压试验系统，采用深低温制冷机组配合高压低温换热贮罐来实现液氢温区高压冷氦气源;使用管壳式加热器真实模拟箭上换热器的换热性能与流阻;提出以排气方式模拟贮箱推进剂消耗过程中压力的变化情况。该试验系统安全可靠，更加真实地模拟了液体火箭冷氦增压系统的工作过程。

The Design of Cryogenic Helium Pressurization Testing System Used in Liquid Hydrogen Temperature

 For the deficiencies in the present experimental studies of cryogenic helium pressurization testing system for liquid rocket, the cryogenic helium pressurization testing system used in liquid hydrogen temperature is designed and built. The high pressure helium supply in liquid hydrogen temperature is obtained by a cryocooler and a cryogenic high pressure tank with the function of heat transfer. To simulate the heat transfer and flow resistance performances of hear exchanger in rocket, a tube shell gas heated exchanger with same heat transfer tubes in rocket is designed. And the pressure of tank when propellant consuming is simulated by air exhaust means of storage tank accurately. The test system is reliable and safety, can simulate the working process of cold helium pressurization system in rocket.