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1976年,美国海军完成了一项空中发射的小体积冲压发动机飞行试验计划,结果是五次飞行都非常成功。每次飞行测得的飞行器性能都非常接近试验前用一个六自由度弹道程序算得的预测值。预测程序中用的数学推进模型是由小体积冲压发动机地面试验计划推演的相关值编制而成的。本文将分别对地面试验计划和推进性能的相关值做简单的介绍和叙述。同时将讨论计算飞行器性能的方法和预测飞行试验的精度。为了研制一种低成本的冲压发动机,也在着手别的工作。本文将说明这一工作的简况。
In 1976, the United States Navy completed a small-scale pilot program of air-launched ramjet flights, with the result that all five flights were very successful. The aircraft performance measured on each flight is very close to the predicted value of a six-degree-of-freedom ballistic program before testing. The mathematical propulsion model used in the forecasting process is compiled from the correlation values deduced from the ground-based pilot program of a small-volume ramjet engine. This article will respectively introduce and describe the relative values of the ground test plan and propulsion performance. The methods of calculating aircraft performance and the accuracy of predicting flight tests will also be discussed. In order to develop a low-cost ramjet engine, is also working on other tasks. This article will provide a brief overview of this work.