航空发动机

冷钢1，2 ，沙嵬3 ，焦自涛 1，2 ，张赫轩 1，2.航空发动机滑油箱负过载腔动态供油数值模拟[J].航空发动机,2025,51(6):127-131

航空发动机滑油箱负过载腔动态供油数值模拟

Numerical Simulation of Dynamic Oil Supply of the Negative-G Chamber of an Aeroengine Oil Tank

DOI：

英文关键词:oil tank zero/negative-g condition negative-g chamber dynamic oil supply numerical simulation aeroengine

基金项目:辽宁省教育厅育苗计划项目（JYT2020116）、国防工业重点研究项目资助

作者	单位
冷钢1，2 ，沙嵬3 ，焦自涛 1，2 ，张赫轩 1，2	1.中国航发沈阳发动机研究所， 2.中国航发航空发动机动力传输重点实验室：沈阳 110015； 3.沈阳航空航天大学航空发动机学院，沈阳 110136

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中文摘要:

为了掌握不同过载工况下的滑油箱持续供油能力，弥补滑油箱过载试验验证能力不足，开展了滑油箱负过载腔油液动态供油过程数值模拟，得到了不同工况下滑油箱内流场结构及供油性能参数。结果表明：在发动机处于0g过载条件下，负过载腔内的滑油在系统抽吸作用下呈现油气两相混合状态，供油流量出现波动现象；在负过载条件下，滑油箱负过载腔内滑油呈油气分离状态，在不同流量工况下能有效供油4.8～7.9 s；负过载腔隔板上的补油孔与通气孔在零负过载条件下产生溢流；在发动机处于 0g过载时，滑油箱补油腔内滑油通过负过载腔隔板上的孔隙进入负过载腔，对负过载腔内的滑油形成补充，有利于提高滑油箱负过载供油能力；在-0.5g～-2.5g条件下，负过载腔向补油腔溢流，减小了负过载腔内可用滑油量。

英文摘要:

To study the sustained oil supply capability of the oil tank under different gravity environments while the experimental validation capability is limited, numerical simulations of the dynamic oil supply process in the negative-g (gravity) chamber of the oil tank were carried out, and the flow field structures and oil supply performance parameters in the tank under different working conditions were obtained. The results show that, under the 0g condition, the oil in the negative-g chamber exhibits an oil-air mixed state due to system suc? tion, resulting in the fluctuation of oil supply flow rate; under negative-g conditions, the oil in the negative-g chamber of the oil tank undergoes oil-air separation, and can effectively supply oil for 4.8 s to 7.9 s under different flow conditions; The oil replenishment hole and air vent holes on the baffle of the negative-g chamber will produce overflow under the zero/negative-g conditions; under 0g condition, the oil in the replenishment chamber of the oil tank enters into the negative-g chamber through the baffle holes, replenishing the oil and enhancing the negative-g oil supply capacity; under -0.5g to-2.5g conditions, the negative-g chamber will overflow to the replenishment chamber, reducing the amount of oil available in the negative-g chamber.

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