Analytical investigation of coalescence effects on the exergy loss in a spontaneously condensing wet-steam flow

被引：34

作者：

Lakzian, Esmail ^{[1
]}

Shaabani, Sima ^{[2
]}

机构：

[1] Hakim Sabzevari Univ, Dept Mech Engn, Sabzevar, Iran

[2] Hakim Sabzevari Univ, Sabzevar, Iran

来源：

INTERNATIONAL JOURNAL OF EXERGY | 2015年 / 16卷 / 04期

关键词：

coalescence; entropy generation; condensing flow; convergent-divergent nozzle; nucleation; exergy loss; NUCLEATING STEAM; ENTROPY GENERATION; HEAT-TRANSFER; DROPLETS; CASCADE; MODELS;

D O I：

10.1504/IJEX.2015.069115

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The effect of coalescence process on entropy generation (exergy loss) in a condensing flow in 1D convergent-divergent nozzle B of Moore is studied. The paper offers governing equations considering coalescence between droplets, and case 1 of Scott is used for solving the coalescence equations. Also a valid model is used to work out the entropy generation due to nucleation. Afterward, coalescence effect on entropy generation is investigated for variables affecting the entropy generation by comparing coalescence and no coalescence results. The results indicate that by considering coalescence, entropy generation (exergy loss) is increased by 0.7% compared to no coalescence case.

引用

页码：383 / 403

页数：21

共 32 条

[1]

Azad M.A. K., 2006, Journal of Chemical Engineering, V24, P25

[2] Classical nucleation theory and its application to condensing steam flow calculations [J].

Bakhtar, F ;

Young, JB ;

White, AJ ;

Simpson, DA .

PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE, 2005, 219 (12) :1315-1333

[3] ON THE PERFORMANCE OF A CASCADE OF TURBINE ROTOR TIP SECTION BLADING IN NUCLEATING STEAM .2. WAKE TRAVERSES [J].

BAKHTAR, F ;

EBRAHIMI, M ;

BAMKOLE, BO .

PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE, 1995, 209 (03) :169-177

[4] NUCLEATION PHENOMENA IN FLOWING HIGH-PRESSURE STEAM .2. THEORETICAL-ANALYSIS [J].

BAKHTAR, F ;

ZIDI, K .

PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY, 1990, 204 (04) :233-242

[5]

Bakhtar F., 1985, P I MECH ENG, V199, P64

[6]

Doering CR, 2000, AIP CONF PROC, V502, P497, DOI 10.1063/1.1302427

[7] Numerical modelling of steam condensing flow in low and high-pressure nozzles [J].

Dykas, Slawomir ;

Wroblewski, Wlodzimierz .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2012, 55 (21-22) :6191-6199

[8] Two-phase Eulerian/Lagrangian model for nucleating steam flow [J].

Gerber, AG .

JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME, 2002, 124 (02) :465-475

[9]

Gyarmathy G, 1962, I THERMAL TURBOMACHI, V6, P125

[10] Computational approach for a pair of bubble coalescence process [J].

Hasan, Nurul ;

Zakaria, Zalinawati Binti .

INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW, 2011, 32 (03) :755-761

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