Integrated Optimal Design Method for Throat Plug Nozzle Profile of Variable Thrust Solid Engine

Abstract

The present application discloses a design method, device, computer equipment and storage medium for a throat plug nozzle profile design of a variable thrust solid engine. The method includes: constructing the design model of the throat plug nozzle profile according to the design requirements and working conditions; establishing the calculation relationship between the design model and the actual specific impulse; adopting the optimized Latin hypercube experimental design method to generate initial sample points; using CFD Model, calculate the actual specific impulse of each initial sample point under each working condition and the average actual specific impulse under all working conditions; construct the initial sample point set and proxy model, and use the differential evolution algorithm to obtain the optimal sample point; use the CFD model, Calculate the optimal actual specific impulse of each optimal sample point under each working condition and the preferred average actual specific impulse under all working conditions; when the first convergence condition is reached, the optimal solution of the design model of the throat plug nozzle profile is obtained . The method can take into account the accuracy and efficiency of design optimization, and the result is reliable.

Description

technical field [0001] The present application relates to the technical field of parameter optimization design of solid rocket motors, in particular to a method and device for the integrated optimization design of throat pin nozzle profile of variable thrust solid rocket motors. Background technique [0002] Solid rocket motor is one of the power systems widely used in space vehicles such as missiles and rockets. It has the advantages of simple structure, convenient maintenance, high reliability, and long-term combat readiness. However, traditional solid rocket motors lack throttling measures , the charge configuration needs to be designed in detail to meet the specific thrust scheme. The variable thrust solid engine not only retains many advantages of the traditional solid engine, but also the thrust adjustment is active, real-time, and can be adjusted steplessly in a wide range, which can improve the performance of the solid rocket engine, enhance the mobility and penetrat...

AI Technical Summary

Problems solved by technology

This type of method can realize the optimal design of the throat plug and nozzle profile with a small calculation cost, and the result is relatively accurate. However, the throat plug needs to move within a certain range during the actual working process of the variable thrust engine, and only for a specific position of the throat plug. Surface optimization cannot comprehensively consider the performance of the engine

[0006] The above two methods can either solve the problem of accuracy, but have the problem of low efficiency, or can solve the problem of low efficiency, but have the problem of insufficient accuracy

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