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>Spectral Attenuation of Sound in Dilute Suspensions with Nonlinear Particle Relaxation
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Spectral Attenuation of Sound in Dilute Suspensions with Nonlinear Particle Relaxation
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机译:带有非线性粒子弛豫的稀悬浮液中声音的频谱衰减
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摘要
Previous studies on the sound attenuation in particle-laden flows under Stokesian drag and conduction-controlled heat transfer have been extended to accommodate the nonlinear drag and heat transfer. It has been shown that for large particle-to-fluid density ratio, the particle Reynolds number bears a cubic relationship with (omega(tau))(sub d) (where omega is the circular frequency and (tau)(sub d) the Stokesian particle relaxation time). This dependence leads to the existence of a peak value in the linear absorption coefficient occurring at a finite value of(omega(tau))(sub d). Comparison of the predictions with the test data for the spectral attenuation of sound with water injection in a perfectly expanded supersonic air jet shows a satisfactory trend of the theory accounting for nonlinear particle relaxation processes.
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