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

喷气风扇是可逆的轴向流动风扇，配备有上游和下游圆柱硅，并已在车辆隧道中用于纵向通风和安全措施，以抑制在发生车祸的情况下抑制火灾。为了确保更有利的车辆隧道，应根据最大程度地降低施工成本和运行时的能源消耗来计划，这是强烈的预期。对于迅速切换流动方向，由于可靠性，几乎总是采用一种将转子驱动转子驱动器的方法。但是，对于两个流动方向提供高空气动力性能的转子叶片仍不清楚，因为它是在单向流下开发的。目前研究的目的是研究两年来研究通过使用CFD相关的转子叶片的性能，并使用CFD评估基于CFD实验的RODOR开发的射流性能。在FIR…更多的ST年中，我们确认较薄的尾边缘是无仰角刀片部分的许多参数中最理想的。然后，我们设计了一个两级喷气风扇，考虑到这些因素，例如叶片负载，噪声等。我们还注意了转子叶片的涡旋类型，并且绝对速度的选定的外围速度成分在径向方向上是恒定的，以及强制涡流类型。我们对拟议的630直径喷气迷进行了性能测试。由于对喷气风扇的独立测试是必需的，因此使用安装在可旋转支撑上的八个3-螺旋柱管的阵列用于测量与旋转速度和刀片设置角相关的出口平面，作为主要参数。从测试中，我们可以看到更好的喷气粉色性能。关于风扇噪声，作为一个典型的例子，即使在较短的消音器下方的出口侧，声压水平也小于90 dB。还测量了转子上游和下游的每个平面上速度和压力的分布，相应的结果表明，所提出的涡流类型适合具有高空气动力学性能的2级喷射风扇。此外，我们确认湍流分析可合理使用以预测通过喷气风扇的流动。较少的