弹射内弹道中的相似方法研究

SIMILITUDE METHOD IN THE INTERIOR BALLISTICS OF EJECTORS

本文对以燃气或燃气加蒸汽为动力源的弹射装置(包括并联或串联无后座式、自弹式、燃气蒸汽式)中的相似方法进行了初步研究,推导出高低压室的相似准则,并以N根管状药为例得出了模型试验应遵守的条件。按照这些条件设计的模型能预示尚未制造出来的实际弹射系统——原型的内弹道性能。在模型中预测的p_1—t,p_2—t,v—t曲线与原型试验结果吻合较好。

Similitude method is tentatively applied for ejectors with gas or gas vapot mixture as the power source (including ejectors belonging to the parallel or series recoillesstype, self-ejecting type and gas/vapor mixture). Criteria of similitude for high-and low-pressure chambers are derived. Taking N pieces of tubular propellant as an example, the conditions to be followed for model testing are derived. Models designed following these conditions be used to predict interior ballistics characteristics of the ejecting system……prototype. The p_1—t, p_2—t, v—t characteristics of the model coincide well with those from actual tests on the prototype.