Effet du retrait sur la stabilisation des flammes cryotechniques

Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy Pub Date : 1998-02-01 DOI:10.1016/S1251-8069(99)80072-4

Don Kendrick, Gerald Herding, Philippe Scouflaire, Carlos Rolon, Sébastien Candel

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引用次数: 5

Abstract

Mechanisms involved in cryogenic flame stabilization are important in liquid rocket propulsion applications. These mechanisms are studied experimentally in this article by considering a single jet-flame formed by a coaxial injector fed by liquid oxygen (LOX) and gaseous hydrogen (GH₂). The flame is analyzed by imaging the light emitted by hydroxyl (OH) radicals. To characterize the reaction zone structure one takes the average of the light emission signal. The result of this operation is then treated by numerical tomography (based on the Abel transform) to get the local volumetric light intensity distribution. This method is used to study the effect of the LOX tube recess on the structure of the flame in the vicinity of the injection plane. It is shown that the recess augments the flame expansion angle and the size of the volume where the reaction takes place.

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收缩对低温火焰稳定性的影响

低温火焰稳定机理在液体火箭推进应用中具有重要意义。本文以液氧(LOX)和气态氢(GH2)的同轴喷射器形成的单一射流火焰为实验对象，研究了这些机理。火焰是通过对羟基(OH)自由基发出的光成像来分析的。为了表征反应区结构，我们取光发射信号的平均值。然后用数值断层扫描(基于阿贝尔变换)处理该操作的结果，以获得局部体积光强分布。利用该方法研究了液态氧管凹槽对喷射平面附近火焰结构的影响。结果表明，凹槽增大了火焰膨胀角和反应发生处的体积大小。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Chemistry-Astronomy

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