EXPERIMENTAL INVESTIGATION OF THE REYNOLDS-NUMBER EFFECT ON THE STEADY AND UNSTEADY LOADING ON A SLIGHTLY ROUGH CIRCULAR CYLINDER AT REYNOLDS NUMBERS UP TO 12 MILLION
This paper presents the Reynolds-number dependent unsteady aerodynamic force and time-averaged local surface pressure distributions acting on a 2D slightly rough circular cylinder up to high transcritical Reynolds numbers. The research was carried out in the High-Pressure Wind Tunnel (DNW-HDG) over...
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ftdlr:oai:elib.dlr.de:104964 2024-05-19T07:33:15+00:00 EXPERIMENTAL INVESTIGATION OF THE REYNOLDS-NUMBER EFFECT ON THE STEADY AND UNSTEADY LOADING ON A SLIGHTLY ROUGH CIRCULAR CYLINDER AT REYNOLDS NUMBERS UP TO 12 MILLION Van Hinsberg, Nils Paul 2016-06 https://elib.dlr.de/104964/ unknown Van Hinsberg, Nils Paul (2016) EXPERIMENTAL INVESTIGATION OF THE REYNOLDS-NUMBER EFFECT ON THE STEADY AND UNSTEADY LOADING ON A SLIGHTLY ROUGH CIRCULAR CYLINDER AT REYNOLDS NUMBERS UP TO 12 MILLION. In: OMAE2016: Proceedings of the ASME 35th International Conference on Ocean, Offshore and Arctic Engineering, Vol 1. OMAE 2016, 2016-06-19 - 2016-06-24, Busan, Süd Korea. Aeroelastische Experimente Konferenzbeitrag PeerReviewed 2016 ftdlr 2024-04-25T00:37:45Z This paper presents the Reynolds-number dependent unsteady aerodynamic force and time-averaged local surface pressure distributions acting on a 2D slightly rough circular cylinder up to high transcritical Reynolds numbers. The research was carried out in the High-Pressure Wind Tunnel (DNW-HDG) over a wide range of Reynolds numbers between 15x10^3 < Re < 12x10^6. The cylinder had a relative surface roughness of ks/D = 1.2x10^-3. The results demonstrated that especially in the critical regime the spanwise flow was strongly three-dimensional. Here, two discontinuities at two closely-spaced Reynolds numbers were observed, coupled with critical fluctuations in the lift force and the time-lagged formation of a separation bubble at each side of the cylinder. The presence of a slight surface roughness led to the disappearance of the supercritical regime, a subsequent strong recovery of the drag coefficient in the upper transition and intermediate steady plateaus for all aerodynamic properties in the transcritical state. Conference Object Arctic German Aerospace Center: elib - DLR electronic library |
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Open Polar |
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German Aerospace Center: elib - DLR electronic library |
op_collection_id |
ftdlr |
language |
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topic |
Aeroelastische Experimente |
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Aeroelastische Experimente Van Hinsberg, Nils Paul EXPERIMENTAL INVESTIGATION OF THE REYNOLDS-NUMBER EFFECT ON THE STEADY AND UNSTEADY LOADING ON A SLIGHTLY ROUGH CIRCULAR CYLINDER AT REYNOLDS NUMBERS UP TO 12 MILLION |
topic_facet |
Aeroelastische Experimente |
description |
This paper presents the Reynolds-number dependent unsteady aerodynamic force and time-averaged local surface pressure distributions acting on a 2D slightly rough circular cylinder up to high transcritical Reynolds numbers. The research was carried out in the High-Pressure Wind Tunnel (DNW-HDG) over a wide range of Reynolds numbers between 15x10^3 < Re < 12x10^6. The cylinder had a relative surface roughness of ks/D = 1.2x10^-3. The results demonstrated that especially in the critical regime the spanwise flow was strongly three-dimensional. Here, two discontinuities at two closely-spaced Reynolds numbers were observed, coupled with critical fluctuations in the lift force and the time-lagged formation of a separation bubble at each side of the cylinder. The presence of a slight surface roughness led to the disappearance of the supercritical regime, a subsequent strong recovery of the drag coefficient in the upper transition and intermediate steady plateaus for all aerodynamic properties in the transcritical state. |
format |
Conference Object |
author |
Van Hinsberg, Nils Paul |
author_facet |
Van Hinsberg, Nils Paul |
author_sort |
Van Hinsberg, Nils Paul |
title |
EXPERIMENTAL INVESTIGATION OF THE REYNOLDS-NUMBER EFFECT ON THE STEADY AND UNSTEADY LOADING ON A SLIGHTLY ROUGH CIRCULAR CYLINDER AT REYNOLDS NUMBERS UP TO 12 MILLION |
title_short |
EXPERIMENTAL INVESTIGATION OF THE REYNOLDS-NUMBER EFFECT ON THE STEADY AND UNSTEADY LOADING ON A SLIGHTLY ROUGH CIRCULAR CYLINDER AT REYNOLDS NUMBERS UP TO 12 MILLION |
title_full |
EXPERIMENTAL INVESTIGATION OF THE REYNOLDS-NUMBER EFFECT ON THE STEADY AND UNSTEADY LOADING ON A SLIGHTLY ROUGH CIRCULAR CYLINDER AT REYNOLDS NUMBERS UP TO 12 MILLION |
title_fullStr |
EXPERIMENTAL INVESTIGATION OF THE REYNOLDS-NUMBER EFFECT ON THE STEADY AND UNSTEADY LOADING ON A SLIGHTLY ROUGH CIRCULAR CYLINDER AT REYNOLDS NUMBERS UP TO 12 MILLION |
title_full_unstemmed |
EXPERIMENTAL INVESTIGATION OF THE REYNOLDS-NUMBER EFFECT ON THE STEADY AND UNSTEADY LOADING ON A SLIGHTLY ROUGH CIRCULAR CYLINDER AT REYNOLDS NUMBERS UP TO 12 MILLION |
title_sort |
experimental investigation of the reynolds-number effect on the steady and unsteady loading on a slightly rough circular cylinder at reynolds numbers up to 12 million |
publishDate |
2016 |
url |
https://elib.dlr.de/104964/ |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
Van Hinsberg, Nils Paul (2016) EXPERIMENTAL INVESTIGATION OF THE REYNOLDS-NUMBER EFFECT ON THE STEADY AND UNSTEADY LOADING ON A SLIGHTLY ROUGH CIRCULAR CYLINDER AT REYNOLDS NUMBERS UP TO 12 MILLION. In: OMAE2016: Proceedings of the ASME 35th International Conference on Ocean, Offshore and Arctic Engineering, Vol 1. OMAE 2016, 2016-06-19 - 2016-06-24, Busan, Süd Korea. |
_version_ |
1799471331120513024 |