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The Experiments for the Enhancement of Regression Rate of Hybrid Rocket Fuel

机译：提高混合火箭燃料回归率的实验

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摘要

Many studies have been conducted to increase regression rate of solid fuel in hybrid rocket. One of them resorts to swirl flow since it can extend the residence time of oxidizer in the fuel grain. Also, metal wires may lead to increase the regression rate of solid fuel as shown in solid propellants. In this study, a series of experiments was designed to investigate the enhancement of regression rate of solid fuel by embedded metal wires and by fuel port grain. And fuel port was designed with a helical configuration to attempt to induce swirl flow. PMMA with gaseous oxygen is the solid fuel used for investigation. Test results showed that embedded metal wires turned out to be ineffective method because only 3-4% increases in regression rate were observed. However, fuel port grain configuration yields higher burning performance of up to 50% increase in regression rate. Also pitch number as well as total impulse was found to be a design variable.
机译：已经进行了许多研究来提高混合动力火箭中固体燃料的回归率。其中之一诉诸涡旋流，因为它可以延长氧化剂在燃料颗粒中的停留时间。同样，金属线可能会导致固体燃料的回归速率增加，如固体推进剂所示。在这项研究中，设计了一系列实验来研究嵌入金属丝和燃料口颗粒对固体燃料的回归率的提高。燃油口设计为螺旋形，以试图引起涡流。具有气态氧的PMMA是用于研究的固体燃料。测试结果表明，嵌入金属线被认为是无效的方法，因为观察到的回归率仅增加了3-4％。但是，燃料孔的颗粒结构可产生更高的燃烧性能，回归率最多可提高50％。音调数和总冲量也被发现是设计变量。

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