|
ИСТИНА |
Войти в систему Регистрация |
ИСТИНА ИНХС РАН |
||
A Hydrodynamic Method for Calculating the Wind Load on the Leeward Slope of a Roof and for Reducing the Pressure Jumpстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 13 февраля 2017 г.
- Авторы: Melnikova O.N., Pokazeev K.V.
- Журнал: Moscow University Physics Bulletin
- Том: 70
- Номер: 5
- Год издания: 2015
- Издательство: Allerton Press
- Местоположение издательства: New York, N.Y., United States
- Первая страница: 423
- Последняя страница: 427
- DOI: 10.3103/S0027134915050100
- Аннотация: A hydrodynamic model for calculating the pressure jump on the leeward slope of a roof during a horizontal air flow that is directed to its slope is proposed for the first time. The model takes the formation of vortices in a viscous layer of an air flow that decelerates in the flow direction into account. When a vortex departs from the viscous layer, flow acceleration occurs at the underlying surface, leading to a considerable pressure drop and to tearing the roof off. It is shown that the negative pressure jump at a site that is adjacent to the roof ridge can be decelerated by several percent with a decreased friction factor and an increased length of the portion of the roof where air flows without separation. A method for considerably reducing the pressure drop is proposed for the first time, viz., the installation of expanding air ducts on the roof, within which a compensatory pressure jump occurs. The results are verified by laboratory studies.
- Добавил в систему: Мельникова Ольга Николаевна