In this paper, the performances and the acoustic noise of the traditional type micro multi-blade fan were investi- gated experimentally and numerically, to optimize the specifications of the fan for the resident circu...In this paper, the performances and the acoustic noise of the traditional type micro multi-blade fan were investi- gated experimentally and numerically, to optimize the specifications of the fan for the resident circumstances. The acoustic noise level decreases but the efficiency deteriorates slightly with the increase of the blade number of the impeller. Besides, the acoustic noise decreases with the increase of the distance between the impeller outlet and the volute tongue, in accompanying with the increase of the input and the deterioration of the fan efficiency.展开更多
文摘夏季由于场温过高,经常会出现电子舱通风故障导致航班延误问题,所以有必要分析电子舱通风故障导致的具体原因和排故方法。某航班出现电子舱通风故障VENT BLOWER FAULT。因停场时间不足,依据MEL办理吹风扇故障保留无M项,按钮已超控,O项已告知机组,机组已完成'O'程序,拔出123VU AD 10跳开开关。排故措施是首日更换气滤和鼓风扇。次日航后排故.
文摘In this paper, the performances and the acoustic noise of the traditional type micro multi-blade fan were investi- gated experimentally and numerically, to optimize the specifications of the fan for the resident circumstances. The acoustic noise level decreases but the efficiency deteriorates slightly with the increase of the blade number of the impeller. Besides, the acoustic noise decreases with the increase of the distance between the impeller outlet and the volute tongue, in accompanying with the increase of the input and the deterioration of the fan efficiency.
