1–20 von 37 Ergebnissen
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    Analysis for vehicle interior noise using helmholtz resonator

    Kozukue, Wakae / Hagiwara, Ichiro / Mohri, Yasuhiro | Tema Archiv | 2005
    carry out by using the finite element method. For the reduction method a Helmholtz resonator, which is well known in the field of acoustics, is ...

    Numerical simulation of Kelvin-Helmholtz instability via direct- and large-eddy simulation

    Lund, T.S. / Werne, J.A. | Tema Archiv | 2004
    Kelvin-Helmholtz (K-H) instability in a stably stratified background is studied numerically in order to support the AirBorne Laser (ABL ...
    Schlagwörter: Kelvin-Helmholtz-Instabilität

    Investigation of Kelvin-Helmholtz induced separation bubble flapping via time-resolved and scanning PIV measurements

    Burgmann, S. / Schröder, W. | Tema Archiv | 2007
    layer to reattach is governed by Kelvin-Helmholtz instabilities. Large scale vortices are formed due to this mechanism at the downstream end of ...
    Schlagwörter: Helmholtz-Gleichung , Kelvin-Helmholtz-Instabilität

    Noise reductions for low speed diesel engines and application of noise measurement using spherical beamforming technique

    Kajihara, Shuhei / Takashima, Kazuhiro / Hoejgaard, Jens et al. | Tema Archiv | 2010
    in the engine room. Secondly, we report some samples of the countermeasures for noise reduction including the application of Helmholtz ...
    Schlagwörter: Helmholtz-Gleichung , Helmholtz-Resonator

    Analysis of transaxle noise using HELS-based near-field acoustic holography

    Moondra, Manmohan / Beniwal, Ravi / Wu, Sean | Tema Archiv | 2006
    This paper describes the analyses of automobile transaxle noise under both stationary and non-stationary conditions using the Helmholtz ...
    Schlagwörter: Helmholtz-Gleichung

    The effect of underwater noise radiation on ship vibration

    Wilken, Marc / Maess, Matthias / Junge, Michael et al. | Tema Archiv | 2007
    been developed to solve the Helmholtz equation, which allows the computation of the sound pressure field in the water due to a structural ...
    Schlagwörter: Helmholtz-Gleichung

    Vibro-acoustic simulations of ships by coupled fast BE-FE approaches

    Brunner, Dominik / Junge, Michael / Wilken, Marc et al. | Tema Archiv | 2009
    comparing the solutions of the Helmholtz and the Laplace equation. The ship itself is modeled with the finite element method. A binary interface to ...
    Schlagwörter: Helmholtz-Gleichung

    Numerical modelling of sound transmission loss of interior aircraft lining elements

    Von Estorff, Otto / Wandel, Martin | Tema Archiv | 2003
    Schlagwörter: Helmholtz-Gleichung

    Time-resolved PIV investigations on the laminar-turbulent transition over laminar separation bubbles

    Hain, Rainer / Kähler, Christian J. / Radespiel, Rolf | Tema Archiv | 2009
    the time-resolved Particle Image Velocimetry in the past. The development of vortices which arise from Kelvin-Helmholtz instabilities is ...
    Schlagwörter: Helmholtz-Gleichung

    Liquid volume measurement for cryogen under microgravity condition

    Nishizu, Takahisa / Torikata, Yasuo / Yamashita, Tomoki et al. | Tema Archiv | 2006
    A Helmholtz resonance technique was employed as an effective technique for measuring volumes of cryogenic propellants in orbit. A closed ...
    Schlagwörter: Helmholtz-Resonator

    Untersuchung der Kopplungseffekte Innenraum-Kofferraum beim Schiebedachwummern an Hand eines SAE-Modells

    Blumrich, Reinhard / Crouse, Bernd / Freed, David et al. | Tema Archiv | 2007
    Schlagwörter: Helmholtz-Resonator

    New pulsating casing collar to improve cementing quality

    Chen, Ping / He, Kaiping / Wu, Jiang | Tema Archiv | 1998
    collar (PCC) is designed according to the Helmholtz oscillator to generate a pulsating jet flow by self-excitation in the cementing process. By ...
    Schlagwörter: Helmholtz-Oszillator

    Humane Automation im Verkehr - ein virtuelles Institut

    Vollrath, Mark | Tema Archiv | 2004
    Mit dem Virtuellen Institut 'Humane Automation im Verkehr' fördert die Helmholtz-Gemeinschaft die Vernetzung und Zusammenarbeit zwischen ...

    Noise source identification in a cross-section of a long-range airliner by means of the inverse finite element method

    Weber, M. / Kletschkowski, T. / Sachau, D. | Tema Archiv | 2009
    Schlagwörter: Helmholtz-Gleichung

    Distinguishing shape details of buried non-metallic mine-like objects with GPR

    Rappaport, C.M. / Wu, S. / Kilmer, M. et al. | Tema Archiv | 1999
    Schlagwörter: Helmholtz-Gleichung

    "Humane Automation im Verkehr": Interdisziplinäre Forschung am Beispiel eines Virtuellen Instituts

    Totzke, I. / Buld, S. / Benmimoun, A. et al. | Tema Archiv | 2006
    Mit dem 2003 gegründeten Virtuellen Institut Humane Automation im Verkehr fördert die Helmholtz-Gemeinschaft die Vernetzung und ...

    Modeling of ethylene in pipeline leak detection system

    Buchert, Jakob | Tema Archiv | 2004
    , specifically for ethylene, to investigate the effect of replacing the BWRS EOS with a modified Helmholtz EOS. The study showed that replacing the EOS ...

    Transmission Loss analyses on fuselage panels: approach, numerical results and validation

    Grooteman, F.P. | Tema Archiv | 2006
    Schlagwörter: Helmholtz-Gleichung

    Visualization of acoustic pressure radiation from complex vibrating structures

    Rayess, N. / Wu, S.F. | Tema Archiv | 1999
    This paper demonstrates visualization of the radiated acoustic pressures from a complex structure by using the Helmholtz Equation Least ...
    Schlagwörter: Helmholtz-Gleichung

    Improvement of the sound transmission loss of panels by means of acoustically tuned resonators

    Hannink, M.H.C. | Tema Archiv | 2006
    Schlagwörter: Helmholtz-Gleichung