Turbulent Premixed Flames
- List three practical examples of turbulent premixed flames in engineering.
- What is the key conceptual/physical reason for the increase in turbulent flame speed compared to laminar flame speed.
- The laminar flame speed is a thermochemical property of the fuel/air mixture at the given composition, temperature, and pressure. What about turbulent flame speeds?
- What are the four turbulent premixed flame regimes?
- On a number line, indicate the integral and Kolmogorov length scales, and indicate the flame thickness location corresponding to the four regimes.
- Define the Damkohler number.
- Does it use large or small scales for the flow?
- If you have higher reaction rates, is Da higher or lower?
- Define the Reynolds number in terms of the turbulent velocity fluctuations.
- Define it using the laminar flame speed and thickness.
- What assumption is made on $\nu$?
- Define the Karlovitz number.
- How is it related to the Damkohler number?