Fill-in-the-blank questions. It is not necessary to show any work. The laminar f

Question

Fill-in-the-blank questions. It is not necessary to show any work. The laminar flame speed for a stoichiometric mixture of a hydrocarbon fuel and air at ambient temperature and pressure is approximately The burned-gas temperature for a laminar premixed flame (with stoichiometric hydrocarbon-air reactants at ambient pressure and temperature) is approximately The burned gas velocity for a laminar premixed flame (with stoichiometric hydrocarbon-air reactants at ambient pressure and temperature) is approximately times the laminar flame speed. For each kg of gasoline that is burned in an internal combustion engine, approximately kg of CO_2 are formed. An important dimensionless parameter in turbulent combustion is the ratio of a fluid mechanical time scale to a chemical time scale. This name of this parameter is the number.

Explanation / Answer

(a) The laminar Flame speed for a stiochiometric mixture of a hydrocarbon fuel and air at ambient temperature and pressure is approxiamatly

     0.43 - 0.45m/s.

(b) The burned gas temperature for a laminar premixed flame is approxiamately-

   350K.

(c) The burned gas velocity for a laminar premixed flame is approxiamately-

  7-8 times the laminar speed

(d) For each L of gasoline that is burned in an internal combustion engine,approxiamately

2.3kg of CO2 are formed.

(e) Damkohler Number-

Da = (Flow time scale ) / (Chemical time scale)

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