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在动力试验中由于受到节流阀门的耐温限制(不超过500°C),经常需要对高温燃气进行冷却处理。冷却高温燃气的方式多种多样,主要可分为两种形式:间壁冷却和喷雾直接冷却,间壁冷却属于间接冷却,冷流体通过金属壁面换热带走热流体热量的一种冷却方式,冷却效率相对较低;而喷雾直接冷却是一种非常高效的冷却方式,其通过直接向待冷却气体喷射水雾,利用水雾的蒸发潜热来降温
In dynamic tests, high temperature gas is often required to be cooled due to the temperature limitation of the throttle valve (up to 500 ° C). Cooling of high temperature gas in a variety of ways, can be divided into two main forms: partition cooling and spray direct cooling, the partition cooling is indirect cooling, cold fluid heat transfer through the metal wall heat away a cooling fluid cooling efficiency Relatively low; whereas direct spray cooling is a very efficient cooling method that reduces the temperature by direct injection of water mist to the gas to be cooled, using the latent heat of vaporization of the water mist