Research On The Seven Hole Probe Measure System

The seven-hole probe (SHP) is a device which can simultaneously measure the pressure and velocities of the steady flow, especially at large angles. But now there hasn't any measure system for seven-hole probe which can integrate pressure data acquisition and data processing together. So it costs much time to complete the SHP calibration and the probe use. In this article, the SHP measure system based on the hardware of PCI-9114(DAQ) and coordinator U511 is developed in VC++. This system is good at getting the pressure data in the space mesh and processing it into velocity, total and static pressures and the field picture. Out of the concept of Virtual Instruments, another SHP measure system is developed in LabVIEW. The system can detect and get the fluid characters of the measure point very quickly just as an instrument which can be used very conveniently. The two experiments on the SHP calibration and the flow field measure of parachute are be finished with the use of the two kinds of SHP measure system separately in wind tunnel. The analysis of the experimental process and data help a lot to both of the improvement of SHP measure system and the SHP experimental techniques. What's more, the flow field pictures which came out of SHP measure are much valuable for the parachute researchers.