期刊
EXPERIMENTS IN FLUIDS
卷 54, 期 6, 页码 -出版社
SPRINGER
DOI: 10.1007/s00348-013-1539-x
关键词
-
资金
- Department of Energy under the Predictive Science Academic Alliance Program (PSAAP) at Stanford University [DE-FC52-08NA28614]
- Air Force Office of Scientific Research (AFOSR)
- Claudia and William Coleman Foundation
Toluene PLIF has been applied to image temperature in supersonic flowfields containing shock waves. Single-and dual-camera imaging schemes with a single excitation wavelength (266 nm) are presented, and the dual-camera scheme is optimized for imaging temperature from 300 to 900 K. The single-camera technique is implemented to verify the diagnostic and image temperature in uniform pressure, uniformly seeded flowfields; calibration is done using the signal ratio measured across an oblique shock wave of known Mach number. The dual-camera technique utilizes the redshift of toluene fluorescence with increasing temperature for temperature imaging in non-uniform pressure and temperature flowfields. Both single-and dual-camera techniques are verified and demonstrated by imaging the flow behind normal shock waves and oblique shock waves, and the dual-camera technique is further extended to image temperature in the non-uniform pressure and temperature field behind a bow shock. Good agreement is observed between the measured and expected temperature distributions calculated from ideal shock relations or CFD solutions. The accuracy of each technique is also evaluated; for dual-camera thermometry, SNR in temperature ranging from 25 at 300 K to 15 at 900 K is observed in single-shot temperature images.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据