Analysis of a Tomography Technique for a Scramjet Wind Tunnel

Elizabeth F. Martin; Christopher P. Goyne; Glenn S. Diskin

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Analysis of a Tomography Technique for a Scramjet Wind Tunnel

机译：超燃冲压风洞的层析成像技术分析

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An experimental activity is currently underway to develop a tunable diode laser absorption tomography (TDLAT) technique to measure flow properties in a supersonic combustion wind tunnel. The present study simulates the reconstruction of spectroscopic measurements to determine the effects of data collection geometry and ambient water vapor on reconstruction accuracy. The study also proposes a way to remove the effects of ambient water vapor absorption. Overall, results show that TDLAT data collection time can be significantly reduced while maintaining reconstruction accuracy by taking fewer projections with a high density of rays and by correcting for ambient water vapor absorption.

机译：目前正在进行一项实验活动，以开发可调谐二极管激光吸收层析成像（TDLAT）技术，以测量超音速燃烧风洞中的流动特性。本研究模拟了光谱测量的重建，以确定数据收集几何形状和环境水汽对重建精度的影响。该研究还提出了消除环境水蒸气吸收影响的方法。总体而言，结果表明，通过减少具有高射线密度的投影并校正周围水蒸气的吸收量，可以显着减少TDLAT数据收集时间，同时保持重建精度。

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《International journal of hypersonics》 |2010年第3期|p.173-179|共7页
作者
Elizabeth F. Martin; Christopher P. Goyne; Glenn S. Diskin;
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Department of Mechanical and Aerospace Engineering, University of Virginia, Charlottesville, Virginia, 22904, USA;

Department of Mechanical and Aerospace Engineering, University of Virginia, Charlottesville, Virginia, 22904, USA;

Chemistry and Dynamics Branch, NASA Langley Research Center;

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Analysis of a Tomography Technique for a Scramjet Wind Tunnel

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