Flow and Heat Transfer Characteristics of Low-Flow Resistance Rocket Kerosene under Supercritical Pressure

doi:10.7652/xjtuxb201901017

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Flow and Heat Transfer Characteristics of Low-Flow Resistance Rocket Kerosene under Supercritical Pressure

更新时间：2025-07-09

- Flow and Heat Transfer Characteristics of Low-Flow Resistance Rocket Kerosene under Supercritical Pressure
- Vol. 53, Issue 1, Pages: 129-134+156(2019)
- 作者机构：
  
  西安交通大学动力工程多相流国家重点实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201901017
  CLC： V511
- Online First：10 January 2019，
  
  Published：2019
- 稿件说明：
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Flow and Heat Transfer Characteristics of Low-Flow Resistance Rocket Kerosene under Supercritical Pressure[J]. 2019, 53(1): 129-134+156.
DOI：

Flow and Heat Transfer Characteristics of Low-Flow Resistance Rocket Kerosene under Supercritical Pressure[J]. 2019, 53(1): 129-134+156. DOI： 10.7652/xjtuxb201901017.

摘要

为探索超临界压力下减阻剂对高温火箭煤油的减阻效果

在压力为15 MPa、质量流速为17 000～50 000 kg·m

-2

·s

-1

(对应常温流速约20～60 m·s

-1

)、流体温度从常温至360 ℃和热流密度为2.5～30 MW·m

-2

的试验条件下

对火箭煤油和添加减阻剂的低流阻火箭煤油在直径2 mm×0.5 mm的高温合金钢管内的流动与换热特性进行了研究。研究发现:在本文研究条件下

煤油传热机理为超临界压力单相类液态强制对流换热; 减阻剂对火箭煤油的减阻效果明显

减阻率最高可达60%; 随着流体温度升高

雷诺数增大

减阻剂的减阻效果降低

减阻率最低下降至约20%; 添加减阻剂后

煤油传热性能显著弱化

但高雷诺数下减阻煤油的换热性能基本维持不变

减阻煤油与火箭煤油的努塞尔数之比约为0.5; 雷诺数小于63 000时减阻效果大于传热弱化效果

大于63 000时结果相反。

Abstract

To explore the drag reduction effect of drag reducer on rocket kerosene under supercritical pressure and high temperature conditions

flow and heat transfer characteristics of rocket kerosene M and low-flow resistance rocket kerosene M-3 with drag reducer were investigated in a Φ2 mm×0.5 mm high-temperature alloy steel tube as active cooling channels. Experiments were conducted at pressure of 15 MPa

mass flow rates of 17 000-50 000 kg/(m

·s)(corresponding to the normal temperature flow rates of about 20-60 m/s)

and heat flux range of 2.5-30 MW/m

. It indicated that:① The heat transfer mechanism of the rocket kerosene under the test con

ditions was supercritical liquid-like forced convection heat transfer; ② The drag reducing effect of drag reducer on rocket kerosene was obvious

the maximum drag reducing rate reached up to 60%

and with the increase of fluid temperature

the Reynolds number increased

the drag reduction effect decreased

and the minimum drag reducing rate approached 20%; ③ For the rocket kerosene with drag reducing agents

the heat transfer reduction occurred significantly

however

the heat transfer performance of kerosene M-3 hardly changed in high Reynolds number conditions

and the Nusselt number ratio of M-3 to M kept at about 0.5; and④ When the Reynolds number was below 63 000

the drag reduction was greater than the heat transfer reduction

while when the Reynolds number was greater than 63 000

the results reversed.

关键词

Keywords

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