DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Experimental evaluation of wind induced pressure fluctuations in cavity shaped open volumetric air receivers

Drexelius, Maximilian and Schwarzbözl, Peter and Pitz-Paal, Robert (2022) Experimental evaluation of wind induced pressure fluctuations in cavity shaped open volumetric air receivers. Solar Energy, pp. 146-157. Elsevier. doi: 10.1016/j.solener.2022.10.003. ISSN 0038-092X.

[img] PDF - Only accessible within DLR bis December 2024 - Postprint version (accepted manuscript)


In this study wind induced surface pressure fluctuations during operation of an open volumetric cavity receiver were investigated in wind tunnel experiments. Due to the process design of the open volumetric receiver, surface pressure fluctuations impact the receiver mass flow which is crucial for cooling the highly irradiated receiver. For this study a model of a solar tower was constructed under the concept of similitude which allows wind tunnel experiments at Reynolds numbers up to 13.17E06. Transient pressure measurements were conducted under 17 different flow directions to evaluate the impact of separation induced pressure fluctuations. The experimental design further allows a rotation of the model to evaluate the impact of changes in wind direction on the surface pressure at the receiver. For cases under a constant wind direction, a critical angle range could be identified in head on wind with a lateral inclination of 45.0 to 78.8° relative to the central receiver axis. The results further show that surface pressure fluctuations are more sensitive to changes in wind direction as the amplitudes with maximum 20 Pa for a Reynolds number of 13.17E06 are about one order of magnitude higher compared to the cases with a constant flow direction. Furthermore, a frequency analysis shows the shielding effect of the cavity design for side-wind as no peaks in the pressure spectrum appear. For flow directions within the critical range of 45.0 to 78.8° a main vortex shedding frequency under constant Strouhal numbers of 0.25 to 0.50 can be observed

Item URL in elib:https://elib.dlr.de/189053/
Document Type:Article
Title:Experimental evaluation of wind induced pressure fluctuations in cavity shaped open volumetric air receivers
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Drexelius, MaximilianUNSPECIFIEDhttps://orcid.org/0000-0001-6591-4039UNSPECIFIED
Schwarzbözl, PeterUNSPECIFIEDhttps://orcid.org/0000-0001-9339-7884UNSPECIFIED
Pitz-Paal, RobertUNSPECIFIEDhttps://orcid.org/0000-0002-3542-3391UNSPECIFIED
Date:3 October 2022
Journal or Publication Title:Solar Energy
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 146-157
Keywords:concentrating solar power, open volumetric receiver, wind tunnel, pressure fluctuations, wind
HGF - Research field:Energy
HGF - Program:Materials and Technologies for the Energy Transition
HGF - Program Themes:High-Temperature Thermal Technologies
DLR - Research area:Energy
DLR - Program:E SW - Solar and Wind Energy
DLR - Research theme (Project):E - Smart Operation
Location: Jülich
Institutes and Institutions:Institute of Solar Research > Solar Power Plant Technology
Deposited By: Drexelius, Maximilian
Deposited On:28 Oct 2022 10:08
Last Modified:15 Nov 2022 09:55

Repository Staff Only: item control page

Help & Contact
electronic library is running on EPrints 3.3.12
Website and database design: Copyright © German Aerospace Center (DLR). All rights reserved.