流体中速度矢量场,跨音速, 二氧化碳,CO2检测方案(粒子图像测速)
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其他
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速度矢量场,跨音速, 二氧化碳,CO2
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共3种
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方案详情文
Particle image velocimetry (PIV) is utilized with solid carbon dioxide (CO2)
seeding material to conduct boundary layer measurements in the test section of the Air
Force Research Laboratory’s Trisonic Gas-dynamics Facility (TGF), which has a 24 inch
by 24 inch cross-section. Freestream velocity was set at Mach 0.3, Mach 0.5, or Mach
0.8 while stagnation pressure ranged from 500 to 2400 pounds per square foot (psf). High
pressure liquid CO2 was directed through expansion nozzles into shroud tubes which led
to solidified particles in the wind tunnel stagnation chamber. Two different sets of
shroud tubes were used to modify the size of dry ice particles produced and the particle
number density. Shroud tubes with an inside diameter (ID) of 0.824 inches provided
good particle count and coverage for stagnation pressures between 500 and 1500 psf,
while 0.364 inch ID shroud tubes demonstrated good particle count and coverage for
stagnation pressures over 1000 psf. Overall, the PIV results produced freestream velocity
measurements and boundary layer profiles which compared well with expected values.
After initial processing, turbulence data closely followed trends expected within
boundary layer, but levels were somewhat higher than anticipated. When the PIV data
was processed using elliptical interrogation regions, elongated in the streamwise
direction, resulting turbulence levels were much closer to expectations.
北京欧兰科技发展有限公司为您提供《流体中速度矢量场,跨音速, 二氧化碳,CO2检测方案(粒子图像测速)》,该方案主要用于其他中速度矢量场,跨音速, 二氧化碳,CO2检测,参考标准《暂无》,《流体中速度矢量场,跨音速, 二氧化碳,CO2检测方案(粒子图像测速)》用到的仪器有德国LaVision PIV/PLIF粒子成像测速场仪、三维立体PIV、Imager sCMOS PIV相机。
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