Dala, L2014-10-092014-10-092014-08Dala, L. 2014. Control of cavity acoustics by surface waviness in landing configurations. International Journal of Research in Aeronautical and Mechanical Engineering, vol. 2(8), pp 24-452321-3051http://www.academia.edu/8002779/Control_of_Cavity_Acoustics_by_Surface_Waviness_In_Landing_Configurationshttp://hdl.handle.net/10204/7705Copyright: 2014 IJRAME Aero Team, Hyderabad. This is an ABSTRACT ONLY. The definitive version is published in International Journal of Research in Aeronautical and Mechanical Engineering, vol. 2(8), pp 24-45The aviation industry’s interest towards cavity control methods rose accordingly due to the acoustic attenuation potential of such methods. However cost effective control devices which are also efficient over a wide range aircraft operations are yet to be developed. This paper investigates the use of a sinusoidal surface modification application upstream of a cavity as a passive acoustics control device in approach conditions. Optimum sinusoidal amplitude and frequency were previously determined by the means of a two-dimensional computational fluid dynamics analysis for a cavity with a length to depth ratio of 4. A complete three-dimensional CFD analysis of this configuration as well as a base-line case without control device was carried out in this study. The overall sound pressure level was reduced with the surface modification at the majority of the points investigated.enCavity control methodsCavity acousticsAviation industryApplied aeronauticsAeroacousticsLanding configurationsCavity noiseArticleDala, L. (2014). Control of cavity acoustics by surface waviness in landing configurations. http://hdl.handle.net/10204/7705Dala, L "Control of cavity acoustics by surface waviness in landing configurations." (2014) http://hdl.handle.net/10204/7705Dala L. Control of cavity acoustics by surface waviness in landing configurations. 2014; http://hdl.handle.net/10204/7705.TY - Article AU - Dala, L AB - The aviation industry’s interest towards cavity control methods rose accordingly due to the acoustic attenuation potential of such methods. However cost effective control devices which are also efficient over a wide range aircraft operations are yet to be developed. This paper investigates the use of a sinusoidal surface modification application upstream of a cavity as a passive acoustics control device in approach conditions. Optimum sinusoidal amplitude and frequency were previously determined by the means of a two-dimensional computational fluid dynamics analysis for a cavity with a length to depth ratio of 4. A complete three-dimensional CFD analysis of this configuration as well as a base-line case without control device was carried out in this study. The overall sound pressure level was reduced with the surface modification at the majority of the points investigated. DA - 2014-08 DB - ResearchSpace DP - CSIR KW - Cavity control methods KW - Cavity acoustics KW - Aviation industry KW - Applied aeronautics KW - Aeroacoustics KW - Landing configurations KW - Cavity noise LK - https://researchspace.csir.co.za PY - 2014 SM - 2321-3051 T1 - Control of cavity acoustics by surface waviness in landing configurations TI - Control of cavity acoustics by surface waviness in landing configurations UR - http://hdl.handle.net/10204/7705 ER -