轿车发动机活塞的冷却技术对于提高压缩比和控制活塞变形十分重要。众所周知,在计算机和空调器中采用热管能够明显改善导热率,然而,发动机冷却不能采用常规的热管,因为气流和液流会受到振动的干扰,因而会使导热率很低。开发了1种新颖的热管,并进行了试验,利用1台高速往复试验装置确定了它的传热系数。试验是在单热管基础上进行的,但成功地使高速往复运动下的传热系数比静止状态的传热系数提高了1.6倍。详细介绍观测到的特性及验证方法。下一步计划将这一方法应用在发动机活塞上。 Car engine piston cooling technology to improve the compression ratio and piston deformation control is very important. It is well-known that the use of heat pipes in computers and air conditioners can significantly improve the thermal conductivity. However, the engine cooling can not use conventional heat pipes because the airflow and the fluid flow are disturbed by the vibrations and therefore the thermal conductivity is low. A novel heat pipe was developed and tested, and its heat transfer coefficient was determined using a reciprocating high-speed test device. The experiment was carried out on the basis of a single heat pipe. However, the heat transfer coefficient under high-speed reciprocating motion was successfully increased by 1.6 times compared with the heat transfer coefficient at rest. Described in detail the observed characteristics and verification methods. The next step is to apply this method to the engine piston.