Throat bolt type variable thrust solid engine thrust matching design method

Abstract

The invention discloses a laryngeal bolt type variable thrust solid engine thrust matching design method which comprises the following steps: step 1, acquiring a thrust time curve to be matched and designed, and uniformly dispersing the thrust time curve according to a time step length to obtain required thrust at each time point; step 2, judging whether the size design of the current throat diameter of the spray pipe and the diameter of the laryngeal plug meets the thrust requirement or not, if yes, directly entering the step 3, and otherwise, updating the size design of the throat diameter of the spray pipe and / or the diameter of the laryngeal plug until the thrust requirement is met and entering the step 3; and step 3, based on the minimum adjustable thrust and the maximum adjustable thrust, adopting a bisection method to obtain the laryngeal plug position at each time point, and achieving laryngeal plug movement scheme matching design. The integrated design of the thrust adjustingcapacity and the laryngeal plug movement scheme is achieved, the laryngeal plug movement scheme under the thrust requirement is given, the throat diameter and the laryngeal plug diameter are adjustedaccording to the thrust requirement, the thrust adjusting capacity is improved, and the laryngeal plug type variable thrust solid engine thrust matching design is achieved.

Description

Technical field [0001] The present invention relates to the field of engine thrust matching design, and is specifically a throat-type variable thrust solid engine thrust matching design method. Background technique [0002] The solid rocket engine is one of the power systems widely used in the aerospace carrier of missiles, rockets. The throat-type thrust solid engine can improve the intelligent level of the engine in real time, and has a wide range of application prospects. The thrust matching design is one of the most core most difficult technologies in the design of the throat-type pushing solid engine design. Its main task is to change the equivalent varying area size by adjusting the position of the throat, thereby regulating the pressure and thrust of the combustion chamber. Instantaneous thrust meets a given thrust curve requirements. [0003] The currently commonly used thrust matching design methods are: [0004] 1. Based on the designed case, the throat movement scheme ...

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Problems solved by technology

[0015] Aiming at the problems of low design efficiency, poor precision and over-reliance on experience in the thrust matching design of the throat plug type variable thrust solid engine mentioned above in the prior art, the present invention provides a throat plug based on the dichotomy method in the classic one-dimensional search method The thrust matching design method of the variable thrust solid engine avoids the application of cumbersome and inefficient evolutionary algorithms, quickly and accurately gives the throat bolt motion scheme under the current thrust demand, and reasonably adjusts the throat diameter and throat bolt diameter according to the thrust demand. Adjustment to improve the thrust adjustment capability and realize the thrust matching design of the throat plug type variable thrust solid engine

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