fan volute 蜗壳
A method to determine low noise fan volute structure is provided.
提供了一种确定低噪声离心通风机蜗壳结构的方法。
The results show that the performance of optimized fan is improved by lowering the energy loss which caused by the secondary flow vortex, the volute tongue, the wake-jet and the angle of attack.
研究结果表明：通过优化有效降低了因二次流漩涡、风机蜗舌结构、尾流-射流和正冲角等造成的能量损失，提高了离心通风机性能。
Technology of step tongue volute is introduced and applied to a centrifugal fan for discharging lampblack.
介绍了阶梯蜗舌技术，并将其应用于一种排油烟的离心风机。
应用推荐