Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Distribution pattern of fluctuating wind pressures on cooling towers in grouped rectangular arrangement
https://orcid.org/0000-0003-1602-7403
Abstract The cooling towers in this study are in a typical grouped arrangement. Traditional research on grouped-tower interference effects usually emphasizes equivalent static wind loads and ignores quantitative definition of interference effects under aerodynamic load, especially those for fluctuating wind pressure distribution patterns. An eight-tower rectangular arrangement with various aerodynamic interference characteristics was selected as the research object on which a rigid-model synchronous-pressure-measurement wind-tunnel test was performed. Fluctuating time-variant pressures on the tower surfaces for different wind directions was obtained. In three typical incoming flow modes: “windward flow”, “crosswind flow” and “leeward flow”, the fluctuating wind pressure distribution around circumferential directions can be summarized as “V” type, “M” type, and half “V” + half “M” type. The interference patterns can be defined as “weak interference”, “asymmetric strong interference” or “symmetric strong interference”, according to which a 9-item fitting formula of fluctuating wind pressure is proposed and a recommended distribution is given. Interference involving aerodynamic correlation and spectra characters of distributed wind loads are further discussed, and a fitting expression of a specific point spectrum is given. The research strategies and conclusions on fluctuating wind pressure interference provide a loading mode reference for evaluating wind resistance design of similar groups of structures.
Highlights Summary of three patterns for fluctuating wind pressure distribution and classification of its interference effects. Proposal of a 9-item formula of fluctuating wind pressure and a recommended distribution to quantify interference effects. A fitting expression of a specific point spectrum based on aerodynamic interference and wind load spectra characters.
Distribution pattern of fluctuating wind pressures on cooling towers in grouped rectangular arrangement
https://orcid.org/0000-0003-1602-7403
Abstract The cooling towers in this study are in a typical grouped arrangement. Traditional research on grouped-tower interference effects usually emphasizes equivalent static wind loads and ignores quantitative definition of interference effects under aerodynamic load, especially those for fluctuating wind pressure distribution patterns. An eight-tower rectangular arrangement with various aerodynamic interference characteristics was selected as the research object on which a rigid-model synchronous-pressure-measurement wind-tunnel test was performed. Fluctuating time-variant pressures on the tower surfaces for different wind directions was obtained. In three typical incoming flow modes: “windward flow”, “crosswind flow” and “leeward flow”, the fluctuating wind pressure distribution around circumferential directions can be summarized as “V” type, “M” type, and half “V” + half “M” type. The interference patterns can be defined as “weak interference”, “asymmetric strong interference” or “symmetric strong interference”, according to which a 9-item fitting formula of fluctuating wind pressure is proposed and a recommended distribution is given. Interference involving aerodynamic correlation and spectra characters of distributed wind loads are further discussed, and a fitting expression of a specific point spectrum is given. The research strategies and conclusions on fluctuating wind pressure interference provide a loading mode reference for evaluating wind resistance design of similar groups of structures.
Highlights Summary of three patterns for fluctuating wind pressure distribution and classification of its interference effects. Proposal of a 9-item formula of fluctuating wind pressure and a recommended distribution to quantify interference effects. A fitting expression of a specific point spectrum based on aerodynamic interference and wind load spectra characters.
Distribution pattern of fluctuating wind pressures on cooling towers in grouped rectangular arrangement
https://orcid.org/0000-0003-1602-7403
Abstract The cooling towers in this study are in a typical grouped arrangement. Traditional research on grouped-tower interference effects usually emphasizes equivalent static wind loads and ignores quantitative definition of interference effects under aerodynamic load, especially those for fluctuating wind pressure distribution patterns. An eight-tower rectangular arrangement with various aerodynamic interference characteristics was selected as the research object on which a rigid-model synchronous-pressure-measurement wind-tunnel test was performed. Fluctuating time-variant pressures on the tower surfaces for different wind directions was obtained. In three typical incoming flow modes: “windward flow”, “crosswind flow” and “leeward flow”, the fluctuating wind pressure distribution around circumferential directions can be summarized as “V” type, “M” type, and half “V” + half “M” type. The interference patterns can be defined as “weak interference”, “asymmetric strong interference” or “symmetric strong interference”, according to which a 9-item fitting formula of fluctuating wind pressure is proposed and a recommended distribution is given. Interference involving aerodynamic correlation and spectra characters of distributed wind loads are further discussed, and a fitting expression of a specific point spectrum is given. The research strategies and conclusions on fluctuating wind pressure interference provide a loading mode reference for evaluating wind resistance design of similar groups of structures.
Highlights Summary of three patterns for fluctuating wind pressure distribution and classification of its interference effects. Proposal of a 9-item formula of fluctuating wind pressure and a recommended distribution to quantify interference effects. A fitting expression of a specific point spectrum based on aerodynamic interference and wind load spectra characters.
Distribution pattern of fluctuating wind pressures on cooling towers in grouped rectangular arrangement
Zhao, Lin (Autor:in) / Chen, Hanlin (Autor:in) / Hu, Xiaonong (Autor:in) / Ge, Yaojun (Autor:in)
13.03.2022
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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