Method and system for determining the burning surface of solid rocket motor charge with double burning rate in stages

Abstract

The invention provides a method and a system for determining the combustion surface of a solid rocket motor segmented dual-combustion speed charge. The three-dimensional configuration of the initial charge of the engine and the axial position of the high and low combustion speed interfaces are given; The three-dimensional configuration of the three-dimensional configuration of the drug is divided into meshes to determine the properties of each grid; according to the axial position of the interface between the high and low burning rates, the initial burning surface node set of the high and low burning rates is determined; based on the high and low burning rate charges and the minimum distance from the node at the axial position of the interface between the high and low burning rates to the point set of the high and low burning speed initial burning surfaces to determine the burning surface interference; After the initial burning surface node set is corrected, the minimum distance function method is used to calculate the burning surface, and the change rules of the burning surface of the high and low burning rate charges are obtained respectively. The invention reduces the computational complexity of the combustion surface and avoids the invalid computation of the non-interference area.

Description

technical field [0001] The invention relates to the technical field of determining the burning surface of a solid rocket motor, in particular to a method and system for determining the burning surface of a solid rocket motor with a segmented double-burning rate charge. Background technique [0002] Determination of burning surface is used to determine the change law of the burning surface area of ​​the charge with the burning time during the burning process. The accuracy of determining the burning surface directly affects the prediction accuracy of the internal ballistic performance of the engine. It is the basis of the internal ballistic design of the engine and has always played an important role in the design of solid rocket motors. [0003] In the design process of a single-chamber dual-propulsion engine, in order to ensure the thrust ratio between the boost stage and the cruising stage, the idea of ​​matching high and low burning rates is often used to design the charge...

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problem that the determination of the burning surface of the double-burning-velocity charge of the solid rocket motor in series depends on the extraction of the dynamic burning surface, which has poor versatility and a large amount of calculation, the present invention provides a method for determining the burning surface of the double-burning-velocity charge of the solid rocket motor and The system, based on the assumption of a fixed burning rate ratio, introduces a virtual initial burning surface, proposes an interface processing method, realizes the preprocessing of the double burning rate charge configuration interference process, completes the decoupling of the calculation process of different charge burning surfaces, and pushes the parallel layer The theory is applied to the calculation of high and low burning rate charges, which effectively solves the problem of determining the burning surface of single-chamber dual-thrust solid rocket motors with dual burning rates.

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