摘要
建成了一座低湍流度静声低速风洞,该风洞选用了蜂窝器、损失系数适当的多层阻尼网,以及优良的大收缩比(14.8)收缩段曲线等先进的低湍流度设计和风洞管壁外隔声处理、风洞管壁内消声处理以及减振处理等降噪设计方法.流场校测结果表明:实验段最大风速可达到75 m/s,常用风速下湍流度可达0.04%~0.05%,背景噪声低,风洞流场品质达到了设计要求.风洞建成后,可以开展模型测力、测压和流动显示实验,还可以利用该风洞从事CFD数值计算验证.
A low-speed, low-turbulence, low-noise and indraft designed wind tunnel has been builts. Using a fine filter mesh, honeycomb and a contraction ratio of 14.8, the flow field is calibrated and the results show that maximum velocity is 75 m/s and the turbulence levels under normal wind speeds are 0.04%-0.05%. Using the noise attenuation, noise isolation and damping treatment, the background noise of wind tunnel is low and flow field quality meets the design requirements. This wind tunnel is equipped with advanced data acquisition system, conventional testing instruments and non-contact optical measurement system to carry out the static and dynamic model aerodynamic testing, real-time, quantitative model surface flow and spatial flow and conduct hardware-in-loop simulation.
作者
荣臻
郑耀
RONG Zhen;ZHENG Yao(School of Aeronautics and Astronautics,Zhejiang University,Hangzhou 310027,China)
出处
《实验室研究与探索》
CAS
北大核心
2019年第11期60-65,共6页
Research and Exploration In Laboratory
基金
国家自然科学基金青年基金项目(11502234)
浙江省自然科学基金项目资助(LY18A020001)
关键词
低速
低湍流度
低噪声
风洞
气动设计
low-speed
low-turbulence
low-noise
wind tunnel
aerodynamic design
