Inlämning av Examensarbete / Submission of Thesis

Mohsen Mohebbi BTH-AMT-EX--2007/D-05--SE, pp. 43. TEK/avd. för maskinteknik, 2007.

The work

Författare / Author: Mohsen Mohebbi
momo052@student.bth.se
Titel / Title: Self-Exciting Oscillation in Gas Fired Appliance
Abstrakt Abstract:

Self exciting oscillation in gas fired appliances leads to abnormal combustion noise which is focused in this work. For studying this phenomena and modeling abnormal combustion noise a simple hand made instrument was made. Then the property of fundamental parts of unit is studied and also some practical methods for reducing the loud noise are given. These methods are based on modification of the fundamental parts of unit. The mathematical model of this phenomenon is illustrated and also the stability criteria for the unit based on this model is given. Then the effect of changing excitation point in this phenomenon is studied and finally the experimental stability diagram based on modification on fuel/air ratio is given.

Ämnesord / Subject: Maskinteknik - Mechanical Engineering\Structural Dynamics

Nyckelord / Keywords: Combustion Oscillation, Combustion Chamber, Auto power spectra, Excitation point, Feedback loop, Impedance, Impulse response, Instability, Noise, Natural Resonance Frequency, Self exciting, Shape mode, Stability, Time history, Transfer function, Vicious circle.

Publication info

Dokument id / Document id:
Program:/ Programme Masters programme in Mechanical Engineering, 60 points
Registreringsdatum / Date of registration: 05/09/2007
Uppsatstyp / Type of thesis: D-Uppsats/Magister/Master

Context

Handledare / Supervisor: Kjell Ahlin
Organisation / Organisation: Blekinge Institute of Technology
Institution / School: TEK/avd. för maskinteknik
S-371 41 Karlskrona
+46 455 38 50 00

Files & Access

Bifogad uppsats fil(er) / Files attached: bth_amt_ex_2007d05_se.pdf (775 kB, öppnas i nytt fönster)