OCR Text |
Show Superscripts and overscripts (v is any variable) v over-dot; flux (quantity of a stuff flowing per second; e.g., m denotes mass, kg, so m denotes mass flux, kg/s) v over-bar; time-mean v "cup"; volumetric stream-average Variables The standard SI units are indicated. For dimensionless quantities, the units cancel, leaving 1 (unity), and this is shown. C0 coefficient in the N O x correlation (5), 1 d\2 distance between the centres of adjacent fuel and air ports at exit, m Db,s = 4^ml I nP°fib > effective ultimate jet source diameter, for the whole flow from a burner, m Dj D\ or £>2, m A> = \^m) / KPJ^} •> effective source diameter for a fuel (j = 1) or air (j = 2) jet from a burner port, D\ fuel port diameter,, m £>2 air port diameter,, m G} G, or G2, N Gj magnitude of G y , N Gxb = NG] cos 0\ + NG2 cos 02, ^-momentum flux from a burner, N G, momentum flux of a fuel jet at port exit (a vector), N G, magnitude of G,, N G2 momentum flux of an air jet at port exit (a vector), N G2 magnitude of G2, N Lf flame length, m ma = Nm2, mass flux of air from a burner in single-burner operation, kg/s = V Nm2 , total mass flux of air from all burners in multiburner operation, kg/s mb = mf +ma, mass flux of fuel plus air, kg/s mf = Nmx, mass flux of fuel from a burner in single-burner operation, kg/s 26 |