同时也获得了多股射流冲击冷却的对流换热系数等值线谱图。
The isograms of heat transfer coefficients of impingement cooling are also obtained.
在相似理论指导下用恒热流方法研究了封闭空间内单孔冲击局部换热系数。
On the basis of the similarity theory, the local impingement heat transfer coefficient of a single hole impinging on a plate in a limited space was studied with constant heat flux methods.
热冲击是由于炉管在某些部位温度变化大，炉管和结焦物的热膨胀系数不同，而产生较大的温差应力，使炉管产生裂纹。
Because of large temperature differences in some local tubes and different expansion coefficients, large stresses of temperature difference are produced and brings about cracking in tubes.
热冲击是由于炉管在某些部位温度变化大，炉管和结焦物的热膨胀系数不同，而产生较大的温差应力，使炉管产生裂纹。
Because of large temperature differences in some local tubes and different expansion coefficients, large stresses of temperature difference are produced and brings about cracking in tubes.
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