Experimental research and error analysis on seven-hole probe measurements of shearing flow field
Xiao Ming · Kongqi donglixue xuebao · 2012
Finite diameters of seven-hole probes will bring systematic errors in the measurement in shearing flow.In this paper,the calibra-tion of the coefficient matrix of the three-dimensional seven-hole probe in steady flow field is carried out by numerical simulation.It is studied that several factors,such as velocity gradient,probe and roll angle,cause systematic error in the measure-ment of parallel shearing flow field by numerical simulation.In the experiment of seven-hole probe measurement of the shearing flow field,it is determined the spatial resolution of the seven-hole probe in shearing flow fields.Critical diameter is defined and the error distribution of seven-hole probes is established in this paper in the measurement of shearing flow fields under the allow-ance of error.