Abstract
The results are presented of 103 tests on the noise generation capability of bunsen burner type premixed hydrocarbon-air turbulent flames. The fuels used have been propane, propylene, acetylene and ethylene, all burning at 1 atmosphere in an anechoic chamber.The results for sound power output, reacting volume and spectral content are correlated with the burner diameter, flow velocity, fuel mass fraction and laminar flame speed; these variables are sufficient to produce correlations with respect to the Reynolds number, Mach number, fuel mass fraction and the first Damköhler similarity group. Introducing a new simplified version of the theory of combustion noise, known turbulent flame speed correlations, and the theory of isotropic turbulence decay downstream of the burner lip, it is shown that the correlations for frequency content and radiated sound power have a rational basis.
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