RT Journal Article
ID 210de1e35a98f44f
A1 Deng , Hongwu
A1 Zhu, Kun
A1 Xu, Guoqiang
A1 Tao, Zhi
A1 Sun , Jining
T1 HEAT TRANSFER CHARACTERISTICS OF RP-3 KEROSENE AT SUPERCRITICAL PRESSURE IN A VERTICAL CIRCULAR TUBE
JF Journal of Enhanced Heat Transfer
JO JEH(T)
YR 2012
FD 2012-11-21
VO 19
IS 5
SP 409
OP 421
K1 CCA
K1 supercritical pressure
K1 RP-3 kerosene
K1 heat transfer
K1 buoyancy
K1 acceleration effect
AB This paper experimentally investigates the heat transfer characteristics of Chinese RP-3 kerosene in the critical condition in a vertical tube. During the experiment, the inlet Reynolds number of the fuel changes from 3 × 103 to 4 × 104, and the Prandtl number changes from 2.8 to 9. Under constant pressure (5 MPa), the heat transfer characteristics of Chinese RP-3 kerosene in the critical condition were measured. The results showed that under constant heat flux (100 to 500 kW/m2), a fixed mass flow rate (7.2 kg/h), and a fixed inlet temperature (400 ± 3 K), the heat transfer characteristics of RP-3 kerosene are different for the upward flow and the downward flow; the heat flux and flow direction both influence the heat transfer characteristics. The pseudocritical temperature is a critical parameter to determine heat transfer enhancement under corresponding conditions. The results also show that the buoyancy effect still influences the heat transfer characteristics when the values of Gr/Re2.7 and Bo* are lower than 10−5 and 6 × 10−6 for the latter part of the test section, respectively, and the effect of flow acceleration can be ignored under the experimental conditions. Based on the experimental data, a reliable heat transfer correlation has been proposed to calculate the Nu number for the normal and enhanced heat transfer process of supercritical fuel in a vertical tube.
PB Begell House
LK https://www.dl.begellhouse.com/journals/4c8f5faa331b09ea,5ce8607327c3f874,210de1e35a98f44f.html