Swirl decay in the gas-liquid two-phase swirling flow inside a circular straight pipe

被引：47

作者：

Liu, Wen ^{[1
]}

Bai, Bofeng ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, State Key Lab Multiphase Flow Power Engn, Xian 710049, Peoples R China

来源：

EXPERIMENTAL THERMAL AND FLUID SCIENCE | 2015年 / 68卷

关键词：

Decaying swirl flow; Gas-liquid two phase; Swirl number; Straight flow; PRESSURE-DROP; HEAT-TRANSFER; PATTERNS; TUBES;

D O I：

10.1016/j.expthermflusci.2015.04.018

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

A complete knowledge of the decay in the gas-liquid two-phase swirling flow is of significant importance for the study on the flow patterns. The decay of the swirl has long been investigated in the single phase swirling flow. However, the decay in the gas-liquid two phase flow is not well understood; no specific models or even no parameters are available to describe the decay. In the present study a visualization experiment on the gas-liquid two phase decaying swirl flow was carried out. The visualization section consisted of transparent circular pipes with total length of 11 m and an inner diameter (D) of 62 mm. The experimental results showed that the gas-liquid two-phase swirling flow transformed to the straight flow as the swirl decayed along the flow. The swirl decayed more rapidly with increasing gas velocities or decreasing liquid velocities. Based on the momentum theorem, a simplified model of the decay in the gas-liquid two phase swirling flow was established to describe the decay. The proposed model was verified both qualitatively and quantitatively. The present model performs well in predicting the axial position of the transition from the swirling flow to the straight flow. This work helps understand the swirl decay in the gas-liquid two-phase flow which is essential for the application of the gas-liquid two phase decaying swirl flow in the industry. (C) 2015 Elsevier Inc. All rights reserved.

引用

页码：187 / 195

页数：9

共 34 条

[1] Effect of twisted tape insert on heat transfer and pressure drop in horizontal evaporators for the flow of R-134a [J].

Akhavan-Behabadi, M. A. ;

Kumar, Ravi ;

Mohammadpour, A. ;

Jamali-Asthiani, M. .

INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID, 2009, 32 (05) :922-930

[2] Helical vortices in swirl flow [J].

Alekseenko, SV ;

Kuibin, PA ;

Okulov, VL ;

Shtork, SI .

JOURNAL OF FLUID MECHANICS, 1999, 382 :195-243

[3]

[Anonymous], 1964, Trans. ASME J. Heat Transfer

[4]

Baker D. W., 1974, Flow: its measurement and control in science and industry. Vol.I, P301

[5] Similarities and differences in the flow patterns and void fraction in vertical upward and downward two phase flow [J].

Bhagwat, Swanand M. ;

Ghajar, Afshin J. .

EXPERIMENTAL THERMAL AND FLUID SCIENCE, 2012, 39 :213-227

[6]

Blasius H., 1913, Das Aehnlichkeitsgesetz bei Reibungsvorgangen in Flussigkeiten BT-Mitteilungen uber Forschungsarbeiten auf dem Gebiete des Ingenieurwesens: insbesondere aus den Laboratorien der technischen, P1, DOI [10.1007/978-3-662-02239-91, DOI 10.1007/978-3-662-02239-91, 10.1007/978-3-662-02239-9_1, DOI 10.1007/978-3-662-02239-9_1]

[7] Forced convective flow and heat transfer of upward cocurrent air-water slug flow in vertical plain and swirl tubes [J].

Chang, Shyy Woei ;

Yang, Tsun Lirng .

EXPERIMENTAL THERMAL AND FLUID SCIENCE, 2009, 33 (07) :1087-1099

[8] Non-linear stability characterization of the thin micropolar liquid film flowing down the inner surface of a rotating vertical cylinder [J].

Chen, Chun-I .

COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION, 2007, 12 (05) :760-775

[9] PRESSURE-GRADIENTS DUE TO FRICTION DURING FLOW OF EVAPORATING 2-PHASE MIXTURES IN SMOOTH TUBES AND CHANNELS [J].

CHISHOLM, D .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 1973, 16 (02) :347-358

[10] A study of swirling turbulent pipe and jet flows [J].

Facciolo, Luca ;

Tillmark, Nils ;

Talamelli, Alessandro ;

Alfredsson, P. Henrik .

PHYSICS OF FLUIDS, 2007, 19 (03)

← 1 2 3 4 →