Analysis of Aerodynamic Performance of Rotor Blade for a Reversible Axial Flow and Its Application to Jet Fan

可逆轴流转子叶片气动性能分析及其在射流风机中的应用

基本信息

批准号：
13650186
负责人：
NISHI Michihiro
金额：
$ 2.24万
依托单位：
Kyushu Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2002
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650186/
关键词：
Axial Fan Jet Fan Tunnel Ventilation Reversible Flow Rotor Performance Vortex Type Aerodynamic Noise 双方向流用翼形流力性能

项目摘要

A jet fan is a reversible axial flow fan fitted with upstream and downstream cylindrical silencers and has been used in a vehicle tunnel for longitudinal ventilation and safety measure to suppress the fire spreading in case of car accident. To secure more favorable vehicle tunnels, which should be planned based on minimizing the cost at construction and the energy consumption at operation, improvement of jet-fan performance is strongly expected. For switching flow direction promptly, a method to drive a rotor in the opposite direction is almost always adopted due to reliability. However, a rotor blade that gives high aerodynamic performance for both flow directions is still unclear, because it has been developed under the one-way flow.The purposes of present research for two years are to investigate the performance of a rotor blade associated with its geometry by using the CFD, and to evaluate the performance of a jet fan with rotor developed based on the CFD experimentally. In the fir … More st year, we confirmed that thin trailing edge is the most desirable among many parameters for camber-less blade section. Then, we designed a two stage jet fan, considering those factors such as blade load, noise, etc. We also paid attention to the vortex type of rotor blade, and selected peripheral component of absolute velocity being constant in the radial direction together with the forced vortex type. We conducted performance test of a proposed jet fan of 630 dia. Since the stand-alone test is necessary for a jet fan, an array of eight 3-holePitot tubes mounted on rotatable support was used to measure the air flow at the exit plane associated with rotational speed and blade setting angle as major parameters. From the test, we can see better jet-fan performance was achieved. Regarding the fan noise, as a typical example, sound pressure level was less than 90 dB even at the exit side under the shorter silencer of around 10%. Distributions of velocity and pressure at each plane upstream and downstream of rotors were also measured, and the corresponding results shows that the proposed vortex type is proper for a 2 stage jet fan having high aerodynamic performance. Further, we confirmed that the turbulent flow analysis was reasonably usable to predict the flow through a jet fan. Less

喷气风扇是一个可逆的风扇，装有上游圆柱形消音器，并曾进行longitudina l通风和安全性，以抑制发生车祸的火灾，以确保在运行时的能量消耗时确保更有利的车辆隧道。，迅速提高了射流性能的速度。两年来，目前的研究目的是y的目的，以研究与CFD的几何形状相关的转子刀片的性能，以及基于CFD实验的Roteloped的射流风扇的性能。在许多无倾斜刀片部分的参数中，我们是最可取的。绝对速度在径向方向上与强制涡流类型一起进行。我们进行了ANCE的性能测试。与旋转速度和刀片角度相关联的出口，即使在出口侧的消音器中，也是90 dB的风扇噪声测得的，相关结果表明，具有高空气动力学性能的2级喷气风扇的支撑涡流类型是合理的。