Through the low speed wind-tunnel force measurements and flow field measurements by the seven-hole probe,the effects of body-strake on lift characteristics of the double-delta-wing aircraft are studied and mechanisms of increasing lift by body-strake are analyzed.

The seven-hole probe(SHP) is a device which can simultaneously measure the pressure and velocities of the steady flow,especially at large angles.

By means of the seven-hole probe measurement in complicated condition,the velocities of the flow field are obtained at three different heights and different flying states.

The cross plane flow field at different axial positions on the lee-ward of the model were scanned by a seven hole probe.

Changing the chamber s shape of the boiler to establish three situation,measuring about the dynamics field with seven probes,the pressure value of each point is educed.

This article introduced the study of seven hole hollow fiber with spiral three dimensional crimps and the technologic improvement on producing stabilization and higher product quality.