1–20 von 22 Ergebnissen
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    Compact analogs of the models of vortex flows generated by aircraft flight

    Freier Zugriff
    Pavlo Lukianov / Lin Song | DOAJ | 2023
    -Helmholtz instability. In addition, two new models of the Burgers-Rott vortex flow were obtained in this study. The first model uses the general ...

    Evaluation of Aeroacoustic Performance of a Helmholtz Resonator System with Different Resonator Cavity Shapes in the Presence of a Grazing Flow

    Dastourani, Hadi / Bahman-Jahromi, Iman | ASCE | 2021
    aeroacoustics performance of a Helmholtz resonator system. This scrutiny is performed for various Mach numbers of the grazing flow in the range of 0–0.4 ...

    Numerical Investigation of Droplet Properties of a Liquid Jet in Supersonic Crossflow

    Freier Zugriff
    Yu-Qi Wang / Feng Xiao / Sen Lin et al. | DOAJ | 2021
    -Lagrangian scheme. The droplet stripping process was calculated by the KH (Kelvin-Helmholtz) breakup model, and the secondary breakup due to the ...

    Aeroacoustic Attenuation Performance of a Helmholtz Resonator with a Rigid Baffle Implemented in the Presence of a Grazing Flow

    Freier Zugriff
    Di Guan / Dan Zhao / Zhaoxin Ren | DOAJ | 2020
    To broaden its’ effective frequency range and to improve its transmission loss performance, a modified design of a Helmholtz resonator is ...

    Phase-Field-Based LBM Analysis of KHI and RTI in Wide Ranges of Density Ratio, Viscosity Ratio, and Reynolds Number

    Freier Zugriff
    Xun Zhou / Bo Dong / Weizhong Li | DOAJ | 2020
    Numerous studies have elaborated the dominated roles of Kelvin-Helmholtz instability (KHI) and Rayleigh-Taylor instability (RTI) in the ...

    Influence of the geometry fidelity of resonant sound-absorbing liner samples on their acoustic characteristics

    Freier Zugriff
    O. Yu. Kustov / I. V. Khramtsov / R. V. Bulbovich | DOAJ | 2019
    Samples of sound-absorbing Helmholtz resonator-type liners of circular shape were manufactured from two types of ABS plastic and nylon on ...
    Schlagwörter: Helmholtz resonator

    Design and implementation of hardware-in-the-loop (HIL) test-bed for spacecraft attitude control

    Freier Zugriff
    Vahid Bohlouri / Hosein Haghighi / Samane Kaviri et al. | DOAJ | 2019
    respect to the practical consideration. This test-bed includes an air bearing 3-DOF table, Helmholtz coil, sun simulator, orbit simulator ...
    Schlagwörter: helmholtz coil

    Modeling of the Two-Dimensional Flow Caused by Sea Conditions and Wind Stresses on the Example of Dead Vistula

    Freier Zugriff
    Zima Piotr | DOAJ | 2018
    -dimensional flow in the form of the bi-harmonic Helmholtz equation for the current function has been adopted, taking into account additional impacts ...
    Schlagwörter: bi-harmonic helmholtz equation

    Tabletop Testbed for Attitude Determination and Control of Nanosatellites

    Silva, Rodrigo Cardoso da / Guimarães, Fernando Cardoso / Loiola, João Victor Lopes de et al. | ASCE | 2018
    testbed is composed of an air-bearing table and a Helmholtz cage. The air-bearing table is a spacecraft simulator that can simulate frictionless ...

    Modeling of the Two-Dimensional Flow Caused by Sea Conditions and Wind Stresses on the Example of Dead Vistula

    Zima, Piotr | Online Contents | 2018
    simplified model of two-dimensional flow in the form of the bi-harmonic Helmholtz equation for the current function has been adopted, taking into ...

    Investigations On Water Circulation in Animal Sea-Water Basins – On the Example of Seals′ Breeding Pools

    Freier Zugriff
    Zima Piotr | DOAJ | 2017
    measurements. For description of flow field in steady conditions a simplified model of 2D flow in the form of Helmholtz biharmonic equation of stream ...

    Investigations On Water Circulation in Animal Sea-Water Basins – On the Example of Seals′ Breeding Pools

    Zima, Piotr | Online Contents | 2017
    in-situ measurements. For description of flow field in steady conditions a simplified model of 2D flow in the form of Helmholtz biharmonic ...

    TO THE STUDY OF WAKE VORTEX BEHIND THE AIRBUS-380 CHARACTERISTICS AT TAKEOFF AND LANDING

    Freier Zugriff
    A. I. Zhelannikov | DOAJ | 2017
    landing regimes it is - six-or eight-vortex system. A mathematical model of the far Wake vortex is based on the exact solution of the Helmholtz ...

    The structure of Kelvin–Helmholtz vortices with super-sonic flow

    Kobayashi, Y. | Online Contents | 2008

    Parametric investigation of acoustic radiation by a beam under load and actuator forces

    Freier Zugriff
    Alexander Zaporozhets / Vadim Tokarev / Werner Hufenbach et al. | DOAJ | 2005
    radiation. The solution of the task is defined by solving of Helmholtz equation and inhomogeneous differential equation for beam bending vibration ...

    Investigation of acoustic field near to elastic thin plate using integral method

    Freier Zugriff
    В.І. Токарев / О.І. Запорожець | DOAJ | 2004
    propagation, radiation and transmission through thin elastic plate is investigated. Necessary for that numerical model was found using the Helmholtz ...