The detection of casing leakage in oil and gas wells or water injection is an important element wellbore integrity management. Ultrasonic technology suitable to detect identify the position well shafts, providing engineering guidance for subsequent treatment. In this paper, ?nite calculation model established by using computational ?uid dynamics method, large eddy simulation Ffowcs Williams-Haw...

Broadband shock-associated noise (BBSAN) is an important component of supersonic jet for jets at off-design conditions when the pressure nozzle exit different from ambient. Two high-area-ratio under-expanded ratios (NPRs) 3.4 and 4.2 are considered. The correspond to experiment in Laboratory Turbulence Research Aerospace Combustion (LTRAC) Supersonic Jet Facility Monash University. Flow solutio...

The design of a rocket launch environment is complex process with many different aspects that are highly interconnected. Acoustics, which one these, should be investigated in detail due to possible devastating effects on the vehicle, crew, and environment. This study uses numerical method consider passive noise reduction applied supersonic jet impinging an inclined flame deflector decrease acou...

The accurate prediction of helicopter rotor blade–vortex interaction (BVI) noise is challenging. This paper presents an implementation the seventh-order improved weighted essentially non-oscillatory (WENO-Z) scheme for predicting BVI using a high-resolution numerical method based on Reynolds-averaged Navier–Stokes and Ffowcs Williams–Hawkings equations. WENO-Z utilized to minimize inherent diss...

the current study presents the results of the aerodynamic noise prediction of the flow field around a naca 0012 airfoil at a chord-based reynolds number of 100,000 and at 8.4 degree angle of attack. an incompressible large eddy simulation (les) turbulence model is applied to obtain the instantaneous turbulent flow field. the noise prediction is performed by the ffowcs williams and hawkings (fw-...

This study focuses on the prediction of hydrodynamic and hydroacoustic performance a cavitating marine propeller in open water condition using Reynolds-averaged Navier-Stokes (RANS) Detached Eddy Simulation (DES) solvers. The effectiveness methods is investigated for recently introduced benchmark that belongs to research vessel ‘The Princess Royal’. main emphasis examine capabilities RANS DES s...

Fluid–structure interactions (FSI) can significantly affect flow and the acoustic field generated by it. In this article, simulations of over a rectangular cavity are conducted with without taking FSI into account. The aim research is to conduct numerical study verify whether between elastic structure itself or pressure field. Four cases involving flexible walls different material parameters on...

In this work, Dynamic Mode Decomposition (DMD) and Proper Orthogonal (POD) methodologies are applied to hydroacoustic dataset computed using Large Eddy Simulation (LES) coupled with Ffowcs Williams Hawkings (FWH) analogy. First, a low-dimensional description of the flow fields is presented modal decomposition analysis. Sensitivity towards DMD POD bases truncation rank discussed, extensive provi...

The goal of this paper is to perform a detailed analysis the hydrodynamic near field and acoustic far NACA 64-618 airfoil with without serrations. impact serrations investigated across different angles attack serration flap angles. natural boundary-layer transition cases 6 7 AIAA Benchmark Problems for Airframe Noise Computations V Workshop Category 1 are considered as benchmark straight edge c...