Method for analyzing microchannel flow heat exchange characteristics of different configuration truncated fins

By analyzing the microchannel flow heat transfer characteristics of different configurations of truncated fins in the scramjet engine of hypersonic vehicles, the V-shaped arrangement was selected, which solved the problem of heat transfer deterioration of supercritical hydrocarbon fuels in the transcritical process and achieved more efficient thermal management and safety.

CN122365997APending Publication Date: 2026-07-10BEIHANG UNIV
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIHANG UNIV
Filing Date
2026-03-31
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

In the scramjet engine of hypersonic vehicles, the drastic changes in the physical properties of supercritical hydrocarbon fuel during the transcritical process lead to reshaping of the flow field structure and changes in turbulence intensity, frequently inducing heat transfer deterioration and affecting the system's heat absorption efficiency and safety.

Method used

The microchannel flow heat transfer characteristics analysis method with different configurations of truncated fins was adopted. Four truncated fin arrangement configurations (T-type, P-type, A-type, and V-type) were studied by numerical simulation to evaluate their ability to suppress heat transfer degradation and improve thermophysical stratification in supercritical hydrocarbon fuels, and the optimal truncated fin arrangement configuration was selected.

Benefits of technology

The V-shaped truncated fin arrangement significantly reduces the maximum wall temperature, achieving better thermal uniformity and higher heat transfer performance, enhancing convective heat transfer intensity, reducing the thermal resistance layer, and ensuring engine safety and lifespan.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122365997A_ABST
    Figure CN122365997A_ABST
Patent Text Reader

Abstract

This invention relates to the field of thermal protection technology for hypersonic vehicle propulsion systems, and proposes a method for analyzing the flow and heat transfer characteristics of microchannels with different truncated fin configurations. The steps include: constructing regenerative cooling microchannels; introducing supercritical hydrocarbon fuel into the regenerative cooling microchannels and applying wall heat flux to the heated section; setting at least four different truncated fin arrangement configurations; obtaining the flow and heat transfer parameters of the microchannels under each configuration through numerical simulation; evaluating the ability of each configuration to suppress heat transfer degradation of supercritical hydrocarbon fuel, the degree of improvement in thermophysical stratification, and the overall heat transfer performance based on the flow and heat transfer parameters; and selecting the optimal truncated fin arrangement configuration based on the evaluation results. This invention successfully realizes the transformation from a state dominated by natural convection prone to heat transfer degradation to a state of efficient forced convection heat transfer, improving the thermal reliability of the regenerative cooling system and providing an important reference for topology optimization of high-performance aero-engine thermal protection systems.
Need to check novelty before this filing date? Find Prior Art