If the velocity of the gas exceeding the flame velocity, what will occur with the flame?

When the velocity of the gas exceeds the flame velocity, the flame is subjected to a condition where the flow of the gas is moving too quickly for the flame to maintain its position. In this scenario, the flame can no longer anchor itself to its fuel source because the combustion reaction cannot keep pace with the fast-moving gas.

As a result, the flame will lift away from the burner or source of ignition instead of remaining attached. This phenomenon occurs because the products of combustion are being carried away faster than the process of ignition and combustion can occur. Therefore, the correct outcome of such a condition is that the flame lifts away, leading to potential safety hazards if not managed properly.

Understanding the dynamics of gas velocities and flame behaviors is crucial for safe operations in environments involving natural gas and other combustion fuels.