Investigation on the thermal mixing enhancement in a T-junction pipe

被引：4

作者：

Hekmat, Mohamad Hamed ^{[1
]}

Saharkhiz, Saleh ^{[1
]}

Izadpanah, Ehsan ^{[2
]}

机构：

[1] Tafresh Univ, Dept Mech Engn, Tafresh 3951879611, Iran

[2] Persian Gulf Univ, Dept Mech Engn, Bushehr, Iran

来源：

JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING | 2019年 / 41卷 / 07期

关键词：

T-junction; Injection angles; Flow rate ratio; Thermal mixing; Mixing index; REVERSE FLOW CHARACTERISTICS; TURBULENCE MODELS; HEAT-TRANSFER; TEMPERATURE; SIMULATIONS; URANS; JETS;

D O I：

10.1007/s40430-019-1776-x

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

In this paper, three-dimensional numerical simulations are conducted to study the thermal mixing of turbulent flow in a T-junction with hot fluid flowing in the main pipe and cold fluid in the branch. The main objective is to investigate the effects of the axial and cross-injection angles to the main pipe and the branch-to-main flow rate ratio on the turbulent thermal mixing. In this regard, an appropriate mixing index is proposed to evaluate the thermal mixing efficiency. The turbulence model employed in this research is the SST k-omega model that can properly capture the mixing behavior of the flow in the main pipe. The results show that the cross-injection angle can considerably affect the thermal mixing enhancement. However, the effects of injection angles on the thermal mixing at lower flow rate ratios are more significant.

引用

页数：11

共 36 条

[11] Turbulent mixing in T-junctions: The role of the temperature as an active scalar [J].

Georgiou, Michail ;

Papalexandris, Miltiadis V. .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2017, 115 :793-809

[12]

GridPro, 2017, SOFTW PACK VER 6 6

[13] Influence of upstream pipe bends on the turbulent heat and mass transfer in T-junctions [J].

Gritskevich, M. S. ;

Garbaruk, A. V. .

INTERNATIONAL CONFERENCE PROBLEMS OF THERMAL PHYSICS AND POWER ENGINEERING (PTPPE-2017), 2017, 891

[14] Investigation of the thermal mixing in a T-junction flow with different SRS approaches [J].

Gritskevich, M. S. ;

Garbaruk, A. V. ;

Frank, Th. ;

Menter, F. R. .

NUCLEAR ENGINEERING AND DESIGN, 2014, 279 :83-90

[15] Promotion of turbulent thermal mixing of hot and cold airflows in T-junction [J].

Hirota, M. ;

Kuroki, M. ;

Nakayama, H. ;

Asano, H. ;

Hirayama, S. .

FLOW TURBULENCE AND COMBUSTION, 2008, 81 (1-2) :321-336

[16] Scale resolved simulations of the OECD/NEA-Vattenfall T-junction benchmark [J].

Hoehne, Thomas .

NUCLEAR ENGINEERING AND DESIGN, 2014, 269 :149-154

[17] Classification of turbulent jets in a T-junction area with a 90-deg bend upstream [J].

Hosseini, Seyed Mohammad ;

Yuki, Kazuhisa ;

Hashizume, Hidetoshi .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2008, 51 (9-10) :2444-2454

[18] T-junction cross-flow mixing with thermally driven density stratification [J].

Kickhofel, John ;

Prasser, Horst-Michael ;

Selvam, P. Karthick ;

Laurien, Eckart ;

Kulenovic, Rudi .

NUCLEAR ENGINEERING AND DESIGN, 2016, 309 :23-39

[19] Analyzing of thermal mixing phenomena in a rectangular channel with twin jets by using artificial neural network [J].

Kok, Besir ;

Uyar, Murat ;

Varol, Yasin ;

Koca, Ahmet ;

Oztop, Hakan F. .

NUCLEAR ENGINEERING AND DESIGN, 2013, 265 :554-565

[20] A numerical study on thermal mixing in narrow channels inserted rectangular bodies [J].

Kok, Besir ;

Firat, Mujdat ;

Oztop, Hakan F. ;

Varol, Yasin .

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER, 2013, 44 :69-76

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