Press-fit high density fuel-rich propellant and preparation method thereof

Abstract

The invention relates to a press-fit high density fuel-rich propellant for solid rocket ramjets and a preparation method thereof. The press-fit high density fuel-rich propellant comprises: 30%-45% ofan oxidant; 45%-60% of fuel; 3%-6% of a binder; 1%-3% of a plasticizer; 1%-3% of a desensitizing agent; and 0.5-2% of a combustion catalyst. The propellant provided by the invention has the characteristics of no need for curing and crosslinking, short production cycle, low cost and low energy consumption, and solves the problem of poor technological performance of existing cast type high solid content (a solid content of greater than 88%) fuel-rich propellants. The propellant provided by the invention has good compressibility, can achieve unidirectional compaction at room temperature, and whenthe specific pressure is lower than 240MPa, the density of the propellant grain (phi 40mm) is 97.5% of the theoretical density. The propellant provided by the invention has high energy and density, the density of the propellant is greater than 2.0g / cm<3>, the calorific value is greater than 45MJ / kg, the primary injection efficiency is more than 96%, and the pressure index is less than 0.55.

Description

technical field [0001] The invention relates to a press-packed high-density fuel-rich propellant for a solid rocket ramjet, belonging to the field of composite propellants. Background technique [0002] Fuel-rich propellants, also known as oxygen-depleted propellants, contain relatively less oxidizer and more metallic combustibles and have high energy characteristics. Oxygen-deficient solid propellant is the power source of solid rocket ramjet, mainly composed of oxidant and fuel. Oxygen-depleted solid propellant can use oxygen in the air, increase the content of high-energy fuel, and reduce the specific gravity of oxidizer, so it has a higher Payload, while reducing the quality of the engine, not only economical but also greatly improved the specific impulse of the engine, prolonging the range of the missile. The excellent performance of the solid ramjet is based on the high-energy characteristics of the oxygen-poor propellant. The higher the energy of the oxygen-poor prop...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a press-packed high-density fuel-rich propellant for a solid rocket ramjet. The propellant of the invention does not require a solidification and cross-linking process, has a short production cycle, low cost, and low energy consumption, and solves the problem of existing pouring The problem of poor manufacturability of fuel-rich propellants with high solid content (solid content greater than 88%)