Numerische Untersuchungen des Primarzerfalls an Kraftstoffdusen fur Flugtriebwerke

By (author) Thilo Dauch

Book cover: Numerische Untersuchungen des Primarzerfalls an Kraftstoffdusen fur Flugtriebwerke

Extent: 154 pages

Publisher: Logos Verlag Berlin

Subjects: Technical Sciences: Computer Science, Engineering, IT, & Math

Language: German

Paperback (Published)

(October 2021)

ISBN: 9783832553913

6.65 x 9.45 inches

Price: $87.00

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Um den schadlichen Einfluss des Luftverkehrs auf die Umwelt zu reduzieren, wird in die Reduktion von Schadstoffemissionen durch Luftfahrtantriebe investiert. Wie vorangehende Arbeiten aufgezeigt haben, besteht ein Zusammenhang zwischen den Eigenschaften des Kraftstoffsprays, das in die Brennkammer des Triebwerks eingebracht wird, und der Entstehung von Schadstoffen bei der Verbrennung. Die Geometrie der Brennstoffduse beeinflusst die Eigenschaften des Kraftstoffsprays und damit die Entstehung von Schadstoffen. Methoden zur Berechnung der Primarzerfallscharakteristik von Kraftstoff im Nahfeld einer Brennstoffduse unter triebwerksrealistischen Bedingungen unterliegen jedoch erheblichen Einschrankungen. An diesem Punkt knupft die vorliegende Arbeit an. Das Ziel der Arbeit besteht in der Entwicklung und Anwendung einer Methodik, mit deren Hilfe der Primarzerfall an einem Airblast-Zerstauber bei triebwerksrealistischen Bedingungen berechnet werden kann. Dazu wird auf die partikelbasierte “Smoothed Particle Hydrodynamics” (SPH) -Methode zuruckgegriffen. Es wird ein Rechengebiet vorgeschlagen, das die Auflosung des Primarzerfalls an einer Kraftstoffduse bei gleichzeitiger Minimierung des numerischen Aufwands ermoglicht. An einem konkreten Beispiel wird die Eignungder Methodik dargelegt. Anhand von Feldern des Finiten-Lyapunov-Exponenten (FTLE) wird die Interaktion zwischen Kraftstoff und Luft an der Phasengrenze analysiert und die Sensitivitat der Primarzerfallscharakteristik bei Variation der Dusengeometrie untersucht.

  • By (author) Thilo Dauch

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