Sound level prediction using a ray tracing algorithm for a blended-wing-body

Rens, Jeannet van; Holten, Theo van; Ruijgrok, G.J.J.; Rens, B. van

doi:10.2514/6.2000-2069

Cited by 1 publication

(1 citation statement)

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“…The report about the application of the UTD method in acoustic calculation is very rare. Rens [13] calculated the diffracted sound field of an engine noise by using the UTD method. Lei [14] studied the acoustic forward scattering by a cylindrical shell.…”

Section: Introductionmentioning

confidence: 99%

The diffracted sound field from the transition region of an axisymmetric body in water

黎雪刚¹,

杨坤德²,

汪勇³

2011

Chinese Phys. B

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Understanding the physical features of the diffracted sound field on the surface of an axisymmetric body is important for predicting the self-noise of a sonar mounted on an underwater platform. The diffracted sound field from the transition region of an axisymmetric body was calculated by the geometrical theory of diffraction. The diffraction ray between the source point and the receiving point on the surface of an axisymmetric body was calculated by using the dynamic programming method. Based on the diffracted sound field, a simulation scheme for the noise correlation of the conformal array was presented. It was shown that the normalized pressure of the diffracted sound field from the transition region reduced with the increases of the frequency and the curvature of the ray. The flow noises of two models were compared and a rather optimum fore-body geometric shape was given. Furthermore, it was shown that the correlation of the flow noise in the low frequencies was stronger than that in the high frequencies. And the flow noise received by the acoustic array on the curved surface had a stronger correlation than that on the head plane at the designed center frequency, which is important for sonar system design.

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Section: Introductionmentioning

confidence: 99%