燃料噴霧の衝突による混合および分布 : 第1報, 等しい2噴流による衝突

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  • The Distributions of Flow Rate and Mixing Ratio of Two Impinging Jets : 1st Report, By Two Jets with Same Dimensions
  • ネンリョウ フンム ノ ショウトツ ニ ヨル コンゴウ オヨビ ブンプ 1

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The distributions of flow rate and mixing ratio are studied for a spray generated by two impinging jets which are generally used for bipropellant liquid rocket systems using hypergol. Instead of the propellant system a water model is used, in which two jets have the same dimensions and one of them is colored. Flow distribution patterns are greatly changed by injection angle ; the flow rate concentrates to the central part with a small injection angle, and increases to the direction of injection with the increase of the injection angle, attaining a flat distribution over 90°. About mixing ratio patterns, equi-mixing lines are nearly parallel to the center line perpendicular to the directions of injection. The two jets flow penetrating each other, so that color of spray is deeper on the oposite side of colored one. To discuss the mixing property, the present auther has introduced "total mixing efficiency" whose value changes according to injection angle. It shows a minimum value when the injection angle is near to right angle, increasing as the injection angle increases or decreases. Flow rate distribution and mixing ratio distribution are also changed according to the shape of nozzle.

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