Narodna in univerzitetna knjižnica, Ljubljana (NUK)
Naročanje gradiva za izposojo na dom
Naročanje gradiva za izposojo v čitalnice
Naročanje kopij člankov
Urnik dostave gradiva z oznako DS v signaturi
  • Numerical investigation on the effects of nozzle geometry on the performance of a pulse detonation engine
    Amin, M. Rahul ; Rouf, Hasan Z. ; Cambier, Jean-Luc
    A numerical study is presented on the effects of various nozzle geometries andoperating conditions on the performance of a Pulse Detonation Engine (PDE).An unsteady numerical simulation model, which ... is second order accurate in space and first order accurate in time, using an automated Java based computational fluid dynamics (CFD) software is presented. One- and two-dimensional transient CFD models were employed in a systematic manner to study the propulsive performance characteristics of the PDE under different operating conditions. Preliminary studies of the effects of nozzle geometry on the performance characteristics of a generic PDE are presented. The results indicate that an expanding nozzle, capable of adapting with the cycle time and the ambient pressure, is very suitable for optimizing the PDE performance. Addition of a straight, diverging or converging nozzle improves the performance. However, it is observed that there is an optimum value of theexit area of a divergent nozzle for performance improvement. At low ambientpressure addition of a nozzle increases the specific impulse of the PDEtube. It is also seen that a diverging nozzle is more effective than a converging-diverging nozzle at low ambient pressure. The study indicates that increased volume of the reacting fuel mixture has a negative effect on the PDEperformance. The results show that a 25% reduction of the reacting fuel mixture leads to approximately 18% increase in the value of the specific impulse.
    Vir: Strojniški vestnik = Journal of mechanical engineering. - ISSN 0039-2480 (Letn. 51, št. 7/8, 2005, str. 484-490)
    Vrsta gradiva - članek, sestavni del
    Leto - 2005
    Jezik - angleški
    COBISS.SI-ID - 8662299

    Povezava(-e):

    Digitalna knjižnica Slovenije - dLib.si

Vnos na polico