Influence study of flow angularity on measuring device in wind tunnel flow field calibration
In order to determine the influence of flow angularity on design parameters of measuring device in low speed wind tunnel flow field calibration,wind tunnel experiment and numerical simulation were conducted to prove the feasibility of the adopted method of assessment.Numerical simulation method was carried out to study the influence of local flow angularity on measuring device blockage,offset,angle of attack and probe length.The law of influence was obtained and the mathematical model of influence was established.The results showed that:the angle of attack,the offset of measuring device and the length of probe have obvious influence on the local flow angularity experiment results,if the measuring device or test method was not properly designed,the error of flow angularity test results could be too large,even leading to wrong experimental conclusion about flow angularity.
low speed wind tunnelflow angularitymeasuring deviceinfluenceflow field calibration
NETL
NSTL
万方数据
