The effect of ventilation aperture location of input airflow rates on the stratified flow

被引:4
作者
Awad, Ahmad [1 ]
Badran, Omar [1 ]
Hold, Arne [2 ]
Calay, Raj [2 ]
机构
[1] Al Balqa Appl Univ, Fac Engn Technol, Dept Mech Engn, Amman 11134, Jordan
[2] Univ Hertfordshire, Fac Engn & Informat Sci, Sch Aerosp Automot & Design Engn, Hatfield AL10 9AB, Herts, England
关键词
Stratified flow; Ventilation; Airflow; Mixed flow; Jet flow;
D O I
10.1016/j.enconman.2008.05.004
中图分类号
O414.1 [热力学];
学科分类号
摘要
The distribution of the stratified flow along and across the flow direction was investigated The effect of. input airflow rates on the stratified flow was conducted Also both effects of hot and cold airflow rate variations were studied. The flow rates studied were in the ranges of Q(h) = 1.0-5.0 m(3)/min for hot airflow, and Q(c) = 0.0-8.0 m(3)/min for cold airflow. These ranges could be useful for studying both stratified and mixed flow. It covers all ranges of Richardson number Ri (from 0.67 to 200). The higher of the input vertical location the higher of the interface level height, where different heights of input vertical locations will results in different levels of stratification. The using of warm jet is more effective, compared with the cold jet flow, because of the effect of bouncy variations on the stratified layer. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码:3253 / 3258
页数:6
相关论文
共 17 条
[1]  
ABDULKARIM HA, 1995, INT J HEAT MASS TRAN, V38, P2489
[2]   Indoor air quality in rooms with cooled ceilings. Mixing ventilation or rather displacement ventilation? [J].
Behne, M .
ENERGY AND BUILDINGS, 1999, 30 (02) :155-166
[3]   Selective ventilation in large enclosures [J].
Calay, RK ;
Borresen, BA ;
Holdo, AE .
ENERGY AND BUILDINGS, 2000, 32 (03) :281-289
[4]   Buoyancy-driven displacement natural ventilation in a single-zone building with three-level openings [J].
Chen, ZD ;
Li, YG .
BUILDING AND ENVIRONMENT, 2002, 37 (03) :295-303
[5]  
DAGESTAD S, 1991, THESIS U TRONDHEIM N
[6]   Natural convection inside ventilated enclosure heated by downward-facing plate: experiments and numerical simulations [J].
Dubovsky, V ;
Ziskind, G ;
Druckman, S ;
Moshka, E ;
Weiss, Y ;
Letan, R .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2001, 44 (16) :3155-3168
[7]   Numerical study of flow and heat transfer characteristics in hot water stores [J].
Hahne, E ;
Chen, Y .
SOLAR ENERGY, 1998, 64 (1-3) :9-18
[8]  
HEEJIN P, 2001, BUILD ENVIRON, V36, P883
[9]   Fundamental atrium design for natural ventilation [J].
Holford, JM ;
Hunt, GR .
BUILDING AND ENVIRONMENT, 2003, 38 (03) :409-426
[10]   The fluid mechanics of natural ventilation - displacement ventilation by buoyancy-driven flows assisted by wind [J].
Hunt, GR ;
Linden, PF .
BUILDING AND ENVIRONMENT, 1999, 34 (06) :707-720