Comparison of spatial correlation parameters between full and model scale launch vehicles | Zendy

Clothilde Giacomoni | Zendy; R. Jeremy Kenny | Zendy

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Comparison of spatial correlation parameters between full and model scale launch vehicles

Author(s) -

Clothilde Giacomoni,

R. Jeremy Kenny

Publication year - 2016

Publication title -

the journal of the acoustical society of america

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.619

H-Index - 187

eISSN - 1520-8524

pISSN - 0001-4966

DOI - 10.1121/1.4969452

Subject(s) - scale (ratio) , spatial correlation , correlation coefficient , correlation , spatial ecology , scale model , acoustics , data set , environmental science , physics , statistics , mathematics , aerospace engineering , geometry , engineering , ecology , quantum mechanics , biology

The current vibro-acoustic analysis tools require specific spatial correlation parameters as input to define the liftoff acoustic environment experienced by the launch vehicle. Until recently, these parameters have not been very well defined. A comprehensive set of spatial correlation data were obtained during a scale model acoustic test conducted in 2014. From these spatial correlation data, several parameters were calculated: the decay coefficient, the diffuse to propagating ratio, and the angle of incidence. Spatial correlation data were also collected on the EFT-1 flight of the Delta IV vehicle which launched on December 5, 2014. A comparison of the spatial correlation parameters from full scale and model scale data will be presented.

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