Research on flow resistance characteristics with different window/door opening angles.(Report): An article from: HVAC & R Research
Book Details
PublisherTaylor & Francis Ltd.
ISBN / ASINB004FFM35G
ISBN-13978B004FFM350
AvailabilityAvailable for download now
Sales Rank99,999,999
MarketplaceUnited States 🇺🇸
Description
This digital document is an article from HVAC & R Research, published by Taylor & Francis Ltd. on November 1, 2010. The length of the article is 3975 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available immediately after purchase. You can view it with any web browser.
From the author: Airflow rate through buildings can depend in part on the degree of opening of various doors and windows. A better understanding of flow resistance characteristics under different window/door opening angles can help us better predict the airflow rate in buildings. Additionally, better understanding of flow characteristics can enable better natural ventilation control strategies. We examined the discharge coefficient and loss coefficient of a window/door with differing degrees of opening through both wind tunnel testing and computational fluid dynamic (CFD) simulation. We were able to match simulated and tested pressure differences across the opening under certain airflow rates. The simulated results for discharge coefficient and loss coefficient matched well with the test data. Results showed that discharge coefficient increases with increasing degree of window/door opening, while the loss coefficient decreases. Additionally, the discharge coefficient [C.sub.d] and loss coefficient [zeta] are all power-correlated with the window/door opening angle [theta]. The loss coefficient decreases sharply with the increasing of the window/door opening angle [theta] when [theta] is smaller than 30[degrees] and plateaus when [theta] is larger than 30[degrees], thus showing that doors and windows do not need to be fully open for optimal natural ventilation.
Citation Details
Title: Research on flow resistance characteristics with different window/door opening angles.(Report)
Author: Caiqing Yang
Publication:HVAC & R Research (Magazine/Journal)
Date: November 1, 2010
Publisher: Taylor & Francis Ltd.
Volume: 16 Issue: 6 Page: 813(12)
Article Type: Report
Distributed by Gale, a part of Cengage Learning
From the author: Airflow rate through buildings can depend in part on the degree of opening of various doors and windows. A better understanding of flow resistance characteristics under different window/door opening angles can help us better predict the airflow rate in buildings. Additionally, better understanding of flow characteristics can enable better natural ventilation control strategies. We examined the discharge coefficient and loss coefficient of a window/door with differing degrees of opening through both wind tunnel testing and computational fluid dynamic (CFD) simulation. We were able to match simulated and tested pressure differences across the opening under certain airflow rates. The simulated results for discharge coefficient and loss coefficient matched well with the test data. Results showed that discharge coefficient increases with increasing degree of window/door opening, while the loss coefficient decreases. Additionally, the discharge coefficient [C.sub.d] and loss coefficient [zeta] are all power-correlated with the window/door opening angle [theta]. The loss coefficient decreases sharply with the increasing of the window/door opening angle [theta] when [theta] is smaller than 30[degrees] and plateaus when [theta] is larger than 30[degrees], thus showing that doors and windows do not need to be fully open for optimal natural ventilation.
Citation Details
Title: Research on flow resistance characteristics with different window/door opening angles.(Report)
Author: Caiqing Yang
Publication:HVAC & R Research (Magazine/Journal)
Date: November 1, 2010
Publisher: Taylor & Francis Ltd.
Volume: 16 Issue: 6 Page: 813(12)
Article Type: Report
Distributed by Gale, a part of Cengage Learning
