压气机内有效滞止压力概念及其应用探索  

Investigation on the concept and application of available stagnation pressure in the compressor

作　　者：侯安平[1] 阙晓斌[1] 熊劲松[1] 周盛[1] 

机构地区：[1]北京航空航天大学能源与动力工程学院航空发动机气动热力重点实验室,北京100191

出　　处：《航空动力学报》2008年第9期1689-1694,共6页Journal of Aerospace Power

基　　金：国家自然科学基金(10477002);凡周基金(20060407)

摘　　要：提出了有效滞止压力的概念来综合考虑流体微团速率与方向对其做功能力的影响,并结合风扇/压气机内部流动的设计要求,从工程应用层面给出了有效滞止压力和压差系数的定义.初步结果表明,有效滞止压力的应用可以更好地反映流动方向对叶轮机非定常流场的影响,并使得流场性能参数对流场质量的变化更敏感,对于合理分析非定常流场是有益的.The aerodynamics design of compressor is definitely required for the flow direction, which, however, isn＇t considered in the definition of stagnation pressure. So, the limitation of stagnation pressure appears when describing the performance of unsteady flow in high load fan/compressor. In order to deal with this limitation, available stagnation pressure was presented to consider the influnence on working capability of small flow volume caused by its velocity value and flow direction. And, according to the design demand of flowing in fan/compressor, the concepts of available stagnation pressure and pressure difference coefficent were defined at the level of engneering aplication. The application of available stagnation pressure can reflect more effectively the influence of flow direction on unsteady flow field in turbomachinery, making the performance characters of flow field change more sensitive to the change of quality of flow field. So the available stagnation pressure is useful to analyze the unsteady flow field.

关 键 词：非定常分离流 滞止压力 风扇/压气机 

分 类 号：V231.3[航空宇航科学与技术—航空宇航推进理论与工程]