可移动式环境风洞气动特性测试与评价

Test and Evaluation of Wind Flow Characteristics of a Portable Wind Tunnel

对中国科学院新疆生态与地理研究所新建的可移动式环境风洞进行了流场测试,分析评价该风洞气动特性,期望对今后的风洞实验开展有所指导。本实验在室内进行,在空洞条件下,用皮托管测量不同风速下(7m.s-1,12m.s-1,16m.s-1)实验段截面风速分布沿流向的变化,测试内容包括风洞实验段的气流稳定性、横向均匀性、紊流度、边界层厚度的分布规律,并与其他环境风洞相比较。结果显示,该风洞气流稳定性系数小于1%,横向不均匀度小于2.5%,紊流度在1%左右,底板边界层和侧壁边界层分别为15cm和10cm,表明该风洞使用效果良好,设计合理。

Wind profiles and flow dynamic characteristics were investigated for a potable wind tunnel recently built by Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences.The objective of this research was to determine the suitability of the wind tunnel for experiment research and provide basic information for future experiments in this wind tunnel.The experiment was conducted in the empty wind tunnel condition.Wind profiles at ten heights under three wind speeds of 7,12,and 16 m·s-1 were measured with Pitot tubes.Five cross sections at 1-m distance in the experiment were investigated,and five wind speed profiles with 20-cm span were measured at each cross section.Results indicate that the flow stability coefficient is less than 1%,the transverse uniformity is less than 2.5%,the turbulence is about 1%,and the thickness of the bottom boundary layer and side wall boundary layer are 15 cm and 10 cm,respectively.This study suggests that this wind tunnel meets the design standard and experiment requirements.