...K. K. Botros; E. Clavelle; H. Satish Acoustic resonances in internal flows can cause noise, vibration, and even equipment damage. One geometry prone to acoustic resonance is a deadleg at the point where the main flow turns into a side branch. Here, we report experimental and computational fluid...

... on the aeroacoustic source of multiple shallow cavities is investigated. The standing wave method (SWM) is used to measure the source, where multiple microphones reconstruct the acoustic standing wave upstream and downstream of the cavities. The effect of the ratio between the separation distance to cavity length...

...-acoustic sources generated by one-, two-, and three-cavity configurations have been experimentally investigated by means of the standing wave method (SWM) for a wide range of Strouhal numbers and acoustic excitation levels. The source strength is found to increase in a nonlinear manner with increasing...

... of the shear layers on and the proximity of the vortices to the slat and the main wing are expected to be strong acoustic dipoles in both cases. 1 Corresponding author. Contributed by the Fluids Engineering Division of ASME for publication in the J OURNAL OF F LUIDS E NGINEERING . Manuscript...

... of the serrated trailing edge. Furthermore, the present study demonstrates the feasibility of performing an acoustic optimization with a hybrid approach that predicts the noise analytically and extracts the aerodynamic input data from a steady-state RANS flow solution. 1 Corresponding author...

...Seung Joong Kim; Hyung Jin Sung Large eddy simulations are carried out to predict the flow noise produced in the solenoid valve of an antilock braking system (ABS) using Lighthill’s acoustic analogy and the Ffowcs Williams and Hawkings (FW–H) surface integral method. The fluid inside the valve...

... of the manufacturing plants, the various air circuits are powered by large-scale radial blowers, the diameters of which can be as much as 2 m or 3 m. These blowers have to provide high volume flow rates, and they are sources of major acoustic disturbances for both workers in the factory and the neighboring inhabitants...

... to 800 Hz, the frequency range of entropy noise generation. Acoustics Computational fluid dynamics LES Turbulence modeling Over the recent decade, the interest in entropy noise, a type of indirect combustion noise generated due to acceleration of temperature inhomogeneities, has witnessed...

... manuscript received April 21, 2017; published online July 10, 2017. Assoc. Editor: Satoshi Watanabe. 05 10 2016 21 04 2017 Acoustics Boundary layers Duct Fluid-structure interaction Liquid-solid waves Channel Pipe flows The propagation of sound waves in ducts is worked...

... for publication, the publisher acknowledges that the United States Government retains, a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this work, or allow others to do so, for United States Government purposes. Acoustics Cavitation Computational fluid...

... for the hydrofoil size variation experiment. Wall effects and flow field interaction are prevented with the aid of computational fluid dynamics. Images taken with a high‐speed camera are used to count N 0 by visual inspection. The noise signals at all conditions are measured and an acoustic bubble counting...

...Xin Liu; Lingjiu Zhou; Xavier Escaler; Zhengwei Wang; Yongyao Luo; Oscar De La Torre A fluid–structure interaction (FSI) system has been solved using the coupled acoustic structural finite element method (FEM) to simplify the cavitating flow conditions around a hydrofoil. The modes of vibration...

... acoustic energy dissipation model is derived from the oscillatory solutions of one-dimensional (1D) nondimensionalized mass and momentum equations to facilitate the interpretation of the results. Tests were performed on a 1500 m long, 50 mm internal diameter pipeline in which pressure disturbances were...

..., modulation, and gas flow rate on the acoustics and spray character within an industrial scale system were investigated computationally using axisymmetric (AS) and three-dimensional (3D) models. Metrics included stream pressure pulsations, spray lift-off, spray angle, and primary droplet length scale, along...

...Wayne Strasser; Francine Battaglia Acoustics and ligament formation within a self-generating and self-sustaining pulsating three-stream injector are analyzed and discussed due to the importance of breakup and atomization of jets for agricultural, chemical, and energy-production industries...

...V. Sivadas; K. Balaji; M. Sampathkumar; M. M. Hassan; K. M. Karthik; Koneru Saidileep The investigation focuses on optimizing the length of wind-pipe that transmits acoustic energy from the compression driver to the cavity of twin-fluid atomizers. To accomplish this objective, the primary variable...

...David R. Escudero; Theodore J. Heindel Understanding the jetting phenomena near the gas distributor plate in a fluidized bed is important to gas–solid mixing, heat and mass transfer, and erosion to any bed internals, which can all affect the performance of the bed. Moreover, acoustic vibration...

... Transfer in Acoustic Streaming Flows ,” Ph.D. thesis, University of California , Los Angeles, p. 229 . [10] Mahler , H. C. , Friess , W. , Grauschopf , U. , and Kiese , S. , 2009 , “ Protein Aggregation: Pathways, Induction Factors and Analysis ,” J. Pharm. Sci. , 98 ( 9 ), pp...

... . Manuscript received February 1, 2015; final manuscript received August 22, 2015; published online October 1, 2015. Assoc. Editor: Moran Wang. 01 02 2015 22 08 2015 Acoustics Aerodynamics Computational fluid dynamics Fluid-structure interaction Unsteady flows A high-speed...