The HART II international workshop: an assessment of the state-of-the-art in comprehensive code prediction
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- 作者：Berend G. van der Wall (1)
Joon W. Lim (2)
Marilyn J. Smith (3)
Sung N. Jung (4)
Jo?lle Bailly (5)
James D. Baeder (6)
D. Douglas Boyd Jr. (7) - 关键词：HART II ; Comprehensive code ; Code validation ; Blade–vortex interaction ; Rotor dynamics ; Rotor aerodynamics ; Rotor wake ; Rotor noise
- 刊名：CEAS Aeronautical Journal
- 出版年：2013
- 出版时间：September 2013
- 年：2013
- 卷：4
- 期：3
- 页码：223-252
- 全文大小：4491KB
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Joon W. Lim (2)
Marilyn J. Smith (3)
Sung N. Jung (4)
Jo?lle Bailly (5)
James D. Baeder (6)
D. Douglas Boyd Jr. (7)
1. German Aerospace Center (DLR), Institute of Flight Systems, Lilienthalplatz 7, 38108, Braunschweig, Germany
2. Ames Research Center, US Army Aeroflightdynamics Directorate, Moffett Field, CA, 94035, USA
3. Georgia Institute of Technology, School of Aerospace Engineering, 270 Ferst Drive, Atlanta, GA, 30332-0150, USA
4. Department of Aerospace Information Engineering, Konkuk University, Seoul, 143-701, Republic of Korea
5. Onera, 8 rue des Vertugadins, 92190, Meudon, France
6. Department of Aerospace Engineering, University of Maryland, College Park, MD, 20742, USA
7. NASA Langley Research Center, Aeroacoustics Branch, Hampton, VA, 23681-2199, USA - ISSN：1869-5590
文摘
Significant advancements in computational fluid dynamics (CFD) and their coupling with computational structural dynamics (CSD, or comprehensive codes) for rotorcraft applications have been achieved recently. Despite this, CSD codes with their engineering level of modeling the rotor blade dynamics, the unsteady sectional aerodynamics and the vortical wake are still the workhorse for the majority of applications. This is especially true when a large number of parameter variations is to be performed and their impact on performance, structural loads, vibration and noise is to be judged in an approximate yet reliable and as accurate as possible manner. In this article, the capabilities of such codes are evaluated using the HART II International Workshop database, focusing on a typical descent operating condition which includes strong blade–vortex interactions. A companion article addresses the CFD/CSD coupled approach. Three cases are of interest: the baseline case and two cases with 3/rev higher harmonic blade root pitch control (HHC) with different control phases employed. One setting is for minimum blade–vortex interaction noise radiation and the other one for minimum vibration generation. The challenge is to correctly predict the wake physics—especially for the cases with HHC—and all the dynamics, aerodynamics, modifications of the wake structure and the aero-acoustics coming with it. It is observed that the comprehensive codes used today have a surprisingly good predictive capability when they appropriately account for all of the physics involved. The minimum requirements to obtain these results are outlined.