Browse > Article
http://dx.doi.org/10.5139/JKSAS.2018.46.11.883

A Numerical Study on Aerodynamic Noise Characteristics of the Tandem Cylinders using DES and FW-H Acoustic Analogy  

Kim, Manshik (The 1st Research and Development Institute, Agency for Defense Development)
Lee, Youn Kyu (The 1st Research and Development Institute, Agency for Defense Development)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.46, no.11, 2018 , pp. 883-891 More about this Journal
Abstract
In this paper, aerodynamic noise simulation was conducted using DES (Detached Eddy Simulation) and FW-H (Ffowcs Williams and Hawkings) acoustic analogy for the tandem cylinders which have configuration similar to a landing gear of airplanes. Numerical simulation for the tandem cylinders whose centers are 3.7D apart was carried out and results were compared with the measured data such as flow characteristics, pressure coefficients on the cylinder surfaces and far-field noise characteristics. It was confirmed that periodically shedded vortices released at the upstream cylinder and impinged on the downstream cylinder surface are major sources of aerodynamic noise. After verifying the computational method of using DES and FW-H acoustic analogy for predicting aerodynamic noise of tandem cylinders, additional simulation was conducted to examine the effect of attaching a splitter plate at the rear of the upstream cylinder. It was confirmed that the noise level in specific frequency band decreased significantly because the splitter plate changed the vortex shedding features and reduced dipole noise source.
Keywords
Tandem Cylinder; Aerodynamic Noise; Detached Eddy Simulation; Acoustic Analogy; Splitter Plate;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Lockard, D. P., "Summary of the Tandem Cylinder Solutions from the Benchmark Problems for Airframe Noise Computations-I Workshop," 49th AIAA Aerospace Science Meeting, January 2011, AIAA 2011-353.
2 Hutcheson, F. V., Brooks, T. F., Lockard, D. P., Choudhari, M. M., and Stead, D. J., "Acoustics and Surface Pressure Measurements from Tandem Cylinder Configurations," 20th AIAA/CEAS Aeroacoustics Conference, June 2014.
3 Spalart, P., Jou, W., Strelets, M., and Allmaras, S., "Comments on the Feasibility of LES for Wings, and on a Hybrid RANS/LES Approach," Advances in DNS/LES, Vol. 1, 1997, pp.4-8.
4 Ffowcs Williams, J. E., and Hawkings, D. L., "Sound Generation by Turbulence and Surfaces in Arbitrary Motion," Philosophical Trans. of Royal Soc. of London, Series A, Vol. 264, No. 1151, 1969, pp.321-342.   DOI
5 Bres, G. A. et al., "Flow and Noise Predictions for the Tandem Cylinder Aeroacoustic Benchmark," Physics of Fluids, Vol. 24, No. 036101, 2012.   DOI
6 Lighthill, M. J., "On Sound Generated Aerodynamically: II. Turbulence as a Source of Sound," Proc. of Royal Soc. of London, Series A, Vol. 222, No. 1148, 1954, pp.1-32.   DOI
7 Farassat, F., "Derivation of Formulations 1 and 1A of Farassat," Technical Memorandum TM-2007-214853, 2007, NASA Langley Research Center.
8 You, D., Choi, H., Choi, M., and Kang, S., "Control of Flow-Induced Noise for a Circular Cylinder using a Splitter Plate," The Korean Soc. for Noise and Vibration Conference, May 1997, pp.636-642.