公开(公告)号：US06301928B1

公开(公告)日：2001-10-16

申请号：US09345480

申请日：1999-07-01

申请人： Nobuhiro Tanatsugu ,  Kenya Harada

发明人： Nobuhiro Tanatsugu ,  Kenya Harada

IPC分类号： F25J100

CPC分类号： B01D53/265 ,  F28F19/006

摘要： The present invention provides a method for preventing the decrease of the efficiency of heat transfer, caused by frost formation, in a precooler of an air breathing engine. In the precooler, the heat exchanger tube is provided. Into the heat exchanger tube, liquid hydrogen serving as a coolant is supplied. The main air flow is sent to the precooler via the intake duct, and the main air flow which is cooled down there, is then sent to a compressor of the air breathing engine. Via the nozzle provided in the middle of the intake duct, ethanol is mixed into the main air flow. Ethanol is carried into the precooler, and condenses together with the water vapor on the surface of the heat exchanger tube. A frost layer thus formed has less cavities and low thermal resistance as compared to that formed when the water vapor condenses solely. Therefore, the decrease of the performance of the heat exchanger, which is caused by the frost formation, can be prevented.

摘要翻译： 本发明提供一种在空气呼吸发动机的预冷器中防止由结霜引起的传热效率降低的方法。 在预冷器中，设置有热交换器管。 进入热交换管，供给作为冷却剂的液态氢。 主空气流经由进气管道被送到预冷器，然后在那里冷却的主空气流被送到空气呼吸发动机的压缩机。 通过设在进气管中间的喷嘴，将乙醇混入主气流。 乙醇被运送到预冷器中，并与热交换器管表面上的水蒸气一起冷凝。 与仅形成水蒸汽时形成的霜层相比，由此形成的霜层具有较少的空腔和低的热阻。 因此，可以防止由霜结构引起的热交换器的性能的降低。