Method To improve the air clearance methods of turbulent air flow in laboratory animal rooms of barrier system by setting non-dynamic facilities which can change the turbulent air flow modality in animal room into unidirectional way.

Because the mouth is impacted by the Changjiang 4km backwater withstand pressure,it often occures section flow direction turbulence,and the test points flow velocity direction back and forth phenomena of the vertical line in the high floodwater level period,therefore cause normal flow measurement trouble and great hydrometry errors.

Analyzes the three characteristic indexes,parallel level of steam line,turbulence level and minimum air velocity,of the rounds wall clean area,and also pointes out its application value and market foreground.

Firstly the design and the structure characteristic of soft wall cleanroom are introduced, and then the three characteristic indexes which are parallel level of steamline, turbulence level and lower limit air velocity are analyzed.