Magnetohydrodynamic instabilities in a weakly ionized, radiating plasma
Magnetohydrodynamic instabilities in a weakly ionized, radiating plasma
复制标题
弱电离辐射等离子体中的磁流体动力学不稳定性
作者：
M. L. Hougen;J. Mccune
在发动机性能的任何表征中，例如空气增强火箭的二级燃烧器，燃烧效率被定义为通过实验确定的某些参数（例如温度）的变化除以其理论计算值。在计算后一个值时可能会出现效率差异的一个影响因素，因为燃料的成分，特别是其颗粒成分，通常是未知的。在本研究中，已证明这些颗粒除 B 和 B2O3 外还可能含有 NH4B5O8-4H20、NH4C1、C 和其他有机物。显然，在将电机性能与理论进行比较之前，必须进行与此处报告类似的测试，以确定分析计算的输入。 ：还讨论了本研究中收集的颗粒的尺寸分析。收到的 B 的模式约为 0.25 突出，对从主发动机排气中收集的颗粒进行的电子显微照片研究表明，该模式没有发生显着变化。然而，由于实验收集方法对测量的粒度分布的影响尚不清楚，因此不能明确地陈述这一结论。
In any characterization of the performance of an engine such as the secondary combustor of an air-augmented rocket, a combustion efficiency is defined as the experimentally determined change in some parameter (e.g., temperature) divided by its theoretically calculated value. One contributing factor to discrepancies in efficiency can arise in calculation of this latter value, because the composition of the fuel, specifically its particulate components, is frequently unknown. In the present study it has been demonstrated that these particles can contain NH4B508-4H20, NH4C1, C, and other organics in addition to B and B203. Clearly, before the performance of a motor is compared with theory, tests similar to those reported here must be conducted to determine the input for the analytical calculation. : Size analyses of the particles collected in the present investigation have also been discussed. The as-received B has a mode on the order of 0.25 jut, and electron micrograph studies of the particles collected from the primary motor exhaust suggest that no significant change in this mode has occurred. However, since the influence of the experimental collection method on the measured particle size distribution is unknown, this conclusion cannot be stated unequivocally.