I need help with my Fire Engineering homework. What is the heat release rate of a flame measuring five feet in height assuming the flame is in the center of a room?
It depends upon the type of fire and the pool diameter (if liquid). For some correlations, see
http://www.haifire.com/Resources/presentations/Flam_and_Comb_Liquids_Symp_9-04_Gottuk.pdf
There may also be a graph in your textbook.
I need help with science engeenering
To calculate the heat release rate of a flame, we need to have some additional information such as the fuel being burned and its composition. The heat release rate is typically expressed in units of power, such as watts.
However, if we assume the flame is a simple unconfined fire, we can estimate the heat release rate using a rule of thumb called the Heskestad formula. This formula provides a rough estimate of the heat release rate based on the height of the flame. Here is the formula:
Q = 50 * H^2/3
Where Q is the heat release rate in megawatts (MW), and H is the height of the flame in meters.
In this case, you mentioned that the flame height is five feet, so we need to convert it to meters. One foot is approximately equal to 0.3048 meters. Therefore, the flame height in meters is:
H = 5 feet * 0.3048 meters/foot = 1.524 meters
Now we can use the Heskestad formula to find the heat release rate:
Q = 50 * (1.524)^2/3
Calculating this expression, we find that the estimated heat release rate of the flame is approximately Q = 86.28 MW.
Please note that this is a rough estimation and assumes specific conditions. In real-world scenarios, the actual heat release rate can vary depending on various factors such as the type and composition of the fuel, ventilation in the room, and combustion efficiency.