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Channel structure capable of inhibiting supercritical fluid flow distribution deviation

A supercritical fluid and channel structure technology, applied in the field of flow and heat transfer, can solve unrealistic problems

Active Publication Date: 2021-01-15
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Limited by the structure and number of cooling channels, it is unrealistic to actively control the flow of each cooling channel to eliminate flow deviation

Method used

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  • Channel structure capable of inhibiting supercritical fluid flow distribution deviation
  • Channel structure capable of inhibiting supercritical fluid flow distribution deviation
  • Channel structure capable of inhibiting supercritical fluid flow distribution deviation

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Experimental program
Comparison scheme
Effect test

Embodiment

[0024] Embodiment: With the cooling channel structure in the present invention, other boundary conditions such as refrigerant flow rate and wall heat flow are consistent with those of the comparative example.

[0025] The cooling process of the comparative example is as follows: due to the inherent nature of the split flow, the branch A away from the refrigerant inlet 1 must obtain the minimum refrigerant flow rate, and at this time, the branch A corresponds to the highest wall heat flow load, and the temperature of the fluid in it rises rapidly and the density low, the fluid flow rate is high, and the flow resistance increases, so branch A can only reduce the resistance by reducing its flow rate until the condition of equal pressure difference at both ends of each parallel channel is satisfied, so the flow rate of branch A that bears the highest thermal load is further increased Significantly reduced, the cooling capacity at the highest thermal load is seriously insufficient, ...

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Abstract

The invention provides a channel structure capable of inhibiting supercritical fluid flow distribution deviation. The channel structure comprises a refrigerant inlet, an inlet liquid collecting chamber, a liquid chamber, a mixing chamber, a supercritical state chamber, an outlet liquid collecting chamber and a refrigerant outlet, wherein the liquid chamber comprises multiple uniform-section runners which are arranged in parallel. The mixing chamber comprises a plurality of regularly-arranged wedge-shaped turbulent flow structures. The supercritical state chamber comprises a plurality of variable-cross-section runners arranged at equal intervals. By means of the channel structure, fluid near the critical state between the runners can be mixed mutually, so that the pressure difference and the temperature difference between the runners are reduced, in addition, the sensitivity of supercritical state fluid flow resistance to wall surface heat flow changes can be reduced, the flow distribution deviation between the runners in the multi-mode thermal environment is inhibited, and the flow distribution uniformity is improved.

Description

technical field [0001] The invention belongs to the technical field of flow and heat transfer, and in particular relates to a channel structure capable of suppressing flow distribution deviation of supercritical fluid. Background technique [0002] Hypersonic aircraft powered by scramjet engines is a research hotspot of great concern to all military powers. Compared with other forms of engines, scramjet engines are relatively simple in structure, low in cost, and have a long range. At the same time, they can form a combined engine with other engines to expand the flight range, such as TBCC and RBCC. Therefore, it is considered to achieve hypersonic speed in the atmosphere. The ideal source of power for flying. [0003] With the increase of the flight Mach number, the scramjet engine is facing a very severe test of the thermal environment. When the flow Mach number is 6, the stagnation temperature can reach 1600K, while the gas temperature after combustion exceeds 2700K, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23R3/28F02K7/10F02K7/14
CPCF23R3/28F02K7/10F02K7/14F23R2900/03045
Inventor 姜俞光周启林王常伟张晋范玮
Owner NORTHWESTERN POLYTECHNICAL UNIV
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