Effect of the bend geometry on the two-phase frictional pressure drop and flow behaviour in the vicinity of the bend

被引：9
作者：
De Kerpel, Kathleen [1 ]
De Schampheleire, Sven [1 ]
De Keulenaer, Timothy [2 ]
De Paepe, Michel [1 ]
机构：
[1] Ghent Univ UGent, Dept Flow Heat & Combust Mech, Sint Pietersnieuwstr 41, B-9000 Ghent, Belgium
[2] Ghent Univ UGent, INTEC IMEC, Sint Pietersnieuwstr 41, B-9000 Ghent, Belgium
来源：
APPLIED THERMAL ENGINEERING | 2016年 / 104卷
关键词：
Two-phase flow; Return bend; Pressure drop; Flow behaviour; Capacitance sensor; Void fraction; SMALL-DIAMETER TUBES; VOID FRACTION SENSOR; HORIZONTAL TUBES; PATTERN; CALIBRATION; SUBJECT; DESIGN; R-410A; MODEL;
D O I：
10.1016/j.applthermaleng.2016.05.083
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The effect of a sharp return bend on the two-phase flow frictional pressure drop close up-and downstream of the bend is investigated. The measurements are performed for refrigerant R134a at mass fluxes ranging from 200 to 500 kg/m(2) s. Four bend geometries are tested, with inner channel diameters ranging from 4.93 mm to 8.1 mm and the curvature ratio between 2.55 and 4.43. For both up-and downward oriented flow the main bend effect on the frictional pressure drop is observed close downstream of the return bend. However, for downward oriented flow a decrease in pressure drop is observed and for upward flow an increase is found. To assess the effect the underlying flow behaviour, the void fraction time trace is analysed. The average void fraction and wavelet variance of the void fraction signal can be used to explain the trends in the frictional pressure drop. The correlation between the frictional pressure drop and the flow behaviour indicators is investigated quantitatively for the different geometries. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：403 / 413
页数：11
相关论文
共 50 条
[21]   Study on effect of rolling on two-phase frictional pressure drop in narrow channels [J].
Zhang, Z., 1600, Atomic Energy Press (35)
[22]   TWO-PHASE FLOW FRICTIONAL PRESSURE DROP OF FC-14 IN HORIZONTAL TUBES [J].
Sun, Er-Yan ;
Chen, Gao-Fei ;
Gong, Mao-Qiong ;
Jun-Shen ;
Wu, Jian-Feng .
THERMAL SCIENCE, 2019, 23 (02) :1067-1074
[23]   Modeling of pressure drop in two-phase flow within expansion geometries [J].
Kourakos, V. G. ;
Rambaud, P. ;
Chabane, S. ;
Buchlin, J. M. .
6TH INTERNATIONAL SYMPOSIUM ON MULTIPHASE FLOW, HEAT MASS TRANSFER AND ENERGY CONVERSION, 2010, 1207 :802-+
[24]   Experimental investigation of air water two-phase flow through vertical 90° bend [J].
Saidj, Faiza ;
Kibboua, Rachid ;
Azzi, Abdelwahid ;
Ababou, Noureddine ;
Azzopardi, Barry James .
EXPERIMENTAL THERMAL AND FLUID SCIENCE, 2014, 57 :226-234
[25]   EXPERIMENTAL AND PREDICTION METHODS INVESTIGATION OF TWO-PHASE FRICTIONAL PRESSURE DROP IN RECTANGULAR NARROW CHANNEL [J].
Huang, Dong ;
Gao, Pu-zhen .
PROCEEDINGS OF THE 21ST INTERNATIONAL CONFERENCE ON NUCLEAR ENGINEERING - 2013, VOL 4, 2014,
[26]   Effect of Void Fraction and Two-Phase Dynamic Viscosity Models on Prediction of Hydrostatic and Frictional Pressure Drop in Vertical Upward GasLiquid Two-Phase Flow [J].
Ghajar, Afshin J. ;
Bhagwat, Swanand M. .
HEAT TRANSFER ENGINEERING, 2013, 34 (13) :1044-1059
[27]   Evaluation analysis of prediction methods for two-phase flow pressure drop in mini-channels [J].
Sun, Licheng ;
Mishima, Kaichiro .
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW, 2009, 35 (01) :47-54
[28]   Flow boiling in horizontal flattened tubes: Part I - Two-phase frictional pressure drop results and model [J].
Quiben, Jesus Moreno ;
Cheng, Lixin ;
Lima, Ricardo J. da Silva ;
Thome, John R. .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2009, 52 (15-16) :3634-3644
[29]   Experimental study on liquid-vapor two-phase pressure drop of pulsating flow in an evaporator [J].
Yang, Peng ;
Zhang, Yuheng ;
Wang, Sophie ;
Liu, Yingwen .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2020, 158
[30]   Analysis of Frictional Pressure Drop Correlations of Refrigerant Two-Phase Flow in Mini-Channel [J].
Liu X. ;
Gu B. ;
Zeng W. ;
Du Z. ;
Tian Z. .
Shanghai Jiaotong Daxue Xuebao/Journal of Shanghai Jiaotong University, 2021, 55 (09) :1095-1107
12345