利用七孔探针对降落伞流场的试验测量研究

采用风洞设备,利用七孔探针对无伞顶孔的平面圆形伞的绕流场进行了试验测量。采用Labview和Matlab engine混合编程技术进行七孔探针的压力数据采集和实时数据处理,获得了伞衣周围的速度及压力分布情况;并对其进行了流场分析,得到无伞顶孔平面圆形伞充满状态下的流场拓扑结构,和沿伞衣径向的压差分布情况。该方法解决了降落伞流场无法定量测量的难题,为降落伞气动性能的分析提供了很好的技术方案。

Seven-hole Probe Measurement on Parachute Flow Field

The flow field of parachute was quite complex because the canopy was a kind of soft fabrics with porosity.It was very difficult to measure the flow field around the canopy with ordinary methods.In wind tannel,seven-hole probe was adopted to measure the flow field around the parachute with a flat,circle canopy without vent.Using the mixed programming technology of Labview combined Matlab engine could easily realize the data collecting and processing.The velocity and pressure distribution were achieved.The flow field topological structures of parachute flow fields and the differential pressure distribution along radial were obtained.This research solved the difficult problem of quantitative measurement on parachute flow field.It is a good technical option to analyze the aerodynamic characteristics of the flow field around the parachute.