J - t loop is precooled by two - stage pulse tube cryocooler in order to obtain liquid helium temperature.
系统设计用两级脉冲管制冷机预冷小型节流制冷机以获得液氦温区环境。
In this paper, two kinds of structural types of air-precooled heat exchangers, plate-fin and tube bundle, chosen and used for composite engines are suggested.
提出组合发动机空气预冷换热器可供选用的板翅式和管束式两种结构型式。对选定参数的空气预冷换热器作了全工况跟踪计算。
In this paper, two kinds of structural types of air-precooled heat exchangers, plate-fin and tube bundle, chosen and used for composite engines are suggested.
提出组合发动机空气预冷换热器可供选用的板翅式和管束式两种结构型式。对选定参数的空气预冷换热器作了全工况跟踪计算。
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