1. Uniform throughout the mixture
  2. Chemically correct mixture
  3. About 35% of rich mixture
  4. About 10% of rich mixture
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1 Answers

Answer: Option 4

An hmh flame speed is obtained in diesel engine when air fuel ratio is About 10% of rich mixture. The flame speed is the measured rate of expansion of the flame front in a combustion reaction. Whereas flame velocity is generally used for a fuel. Combustion engineers differentiate between the laminar flame speed and turbulent flame speed. Flame speed is typically measured in m/s, cm/s, etc.

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