Aerodynamic external pressure loads on a semi-circular bluff body under wind gusts. (April 2015)
- Record Type:
- Journal Article
- Title:
- Aerodynamic external pressure loads on a semi-circular bluff body under wind gusts. (April 2015)
- Main Title:
- Aerodynamic external pressure loads on a semi-circular bluff body under wind gusts
- Authors:
- Chevula, Sreenadh
Sanz-Andres, Angel
Franchini, Sebastián - Abstract:
- Abstract: This brief communication concerns the unsteady aerodynamic external pressure loads acting on a semi-circular bluff body lying on a floor under wind gusts and describes the theoretical model, experimental setup, and experimental results obtained. The experimental setup is based on an open circuit, closed test section, low speed wind tunnel, which includes a sinusoidal gust generating mechanism, designed and built at the Instituto de Microgravedad "Ignacio Da Riva" of the Universidad Politécnica de Madrid (IDR/UPM). Based on the potential flow theory, a theoretical model has been proposed to analyse the problem, and experimental tests have been performed to study the unsteady aerodynamic loads on a semi-circular bluff body. By fitting the theoretical model predictions with the experimental results, influencing parameters of the unsteady aerodynamic loads are ascertained. The values of these parameters can help in clarifying the phenomenon of the external pressure loads on semi-circular bluff body under various gust frequencies. The theoretical model proposed allows the pressure variation to be split into two contributions, a quasi-steady term and an unsteady term with a simple physical meaning. Highlights: Unsteady aerodynamic loads acting on bluff bodies have been investigated. A theoretical model has been proposed to analyze these unsteady loads. A new stagnation-pressure referenced coefficient has been proposed. Contribution of the steady & unsteady flows on theAbstract: This brief communication concerns the unsteady aerodynamic external pressure loads acting on a semi-circular bluff body lying on a floor under wind gusts and describes the theoretical model, experimental setup, and experimental results obtained. The experimental setup is based on an open circuit, closed test section, low speed wind tunnel, which includes a sinusoidal gust generating mechanism, designed and built at the Instituto de Microgravedad "Ignacio Da Riva" of the Universidad Politécnica de Madrid (IDR/UPM). Based on the potential flow theory, a theoretical model has been proposed to analyse the problem, and experimental tests have been performed to study the unsteady aerodynamic loads on a semi-circular bluff body. By fitting the theoretical model predictions with the experimental results, influencing parameters of the unsteady aerodynamic loads are ascertained. The values of these parameters can help in clarifying the phenomenon of the external pressure loads on semi-circular bluff body under various gust frequencies. The theoretical model proposed allows the pressure variation to be split into two contributions, a quasi-steady term and an unsteady term with a simple physical meaning. Highlights: Unsteady aerodynamic loads acting on bluff bodies have been investigated. A theoretical model has been proposed to analyze these unsteady loads. A new stagnation-pressure referenced coefficient has been proposed. Contribution of the steady & unsteady flows on the final loads have been analysed. Unsteady flow terms are in quadrature with the quasi-steady term. … (more)
- Is Part Of:
- Journal of fluids and structures. Volume 54(2015:Apr.)
- Journal:
- Journal of fluids and structures
- Issue:
- Volume 54(2015:Apr.)
- Issue Display:
- Volume 54 (2015)
- Year:
- 2015
- Volume:
- 54
- Issue Sort Value:
- 2015-0054-0000-0000
- Page Start:
- 947
- Page End:
- 957
- Publication Date:
- 2015-04
- Subjects:
- Aerodynamics loads -- External pressure -- Semi-circular bluff bodies -- Gusty winds -- Potential flow
Fluid-structure interaction -- Periodicals
Fluid mechanics -- Periodicals
Structural dynamics -- Periodicals
Structural analysis (Engineering) -- Periodicals
620.106 - Journal URLs:
- http://www.sciencedirect.com/science/journal/08899746 ↗
http://www.idealibrary.com ↗
http://firstsearch.oclc.org ↗
http://www.elsevier.com/journals ↗ - DOI:
- 10.1016/j.jfluidstructs.2015.02.004 ↗
- Languages:
- English
- ISSNs:
- 0889-9746
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - 4984.510000
British Library DSC - BLDSS-3PM
British Library HMNTS - ELD Digital store - Ingest File:
- 7264.xml