空气预冷换热器的性能计算

PERFORMANCE CALCULATION OF AIR-PRECOOLED HEAT EXCHANGER

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。指出此种换热器的固有工作特点,给出其空气通道阻力特性的数值结果,以及通道尺寸和壁厚对换热器工作参数的影响。还对今后的工作提出了若干建议。

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. A calculation followed all operating conditions is made to air-precooled heat exchangers, parameters of which are selected. Inherent charactristics of those kinds of heat exchangers,numerical results of their air duct drag characteristics,and influences of duct dimension and wall thickness on operating parameters of heat exchangers are shown clearly. Also some suggestions about future task are proposed.