Reusability liquid rocket engine body with phase change buffer sandwich
By introducing a combination of phase change buffer layer and regenerative cooling layer into the thrust chamber of a liquid rocket engine, and utilizing the latent heat effect of phase change materials, the thermal fatigue problem caused by alternating hot and cold temperatures during the start-stop cycle of a reusable liquid rocket engine is solved, resulting in a significant increase in thrust chamber life and improved structural reliability and lightweighting.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- JIUZHOU CLOUD ARROW (BEIJING) SPACE TECH CO LTD
- Filing Date
- 2026-03-26
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies cannot effectively solve the problem of insufficient thermal fatigue life caused by alternating hot and cold temperatures during start-stop cycles in reusable liquid rocket engines. Existing regenerative cooling structure optimization can only reduce the wall temperature during steady-state operation, but cannot alleviate transient temperature changes, leading to frequent occurrence of thermal fatigue cracks.
A phase change buffer layer is added to the traditional regenerative cooling jacket. The jacket is filled with phase change material, which alleviates the temperature change rate and thermal stress in the engine start-stop cycle through the latent heat effect of phase change. It includes a grid-like or rib-like support structure and an independent closed phase change material cavity to ensure the reversible phase change and thermal buffering effect of the phase change material.
It significantly reduces the wall temperature change rate and cyclic thermal stress during engine start-stop cycles, inhibits the initiation and propagation of thermal fatigue cracks, improves the repeated service life of the thrust chamber body, takes into account structural reliability and lightweight requirements, and is compatible with existing regenerative cooling systems without modification.
Smart Images
Figure CN122407404A_ABST