relative airflow

relative airflow (RAF)

The air in a region where the pressure, temperature, and relative velocity are unaffected by the passage of aircraft through it. Also known as free-stream flow
References in periodicals archive ?
The enhanced controls strategies are to (1) reduce the relative airflow (cfm/ton) at high relative humidity levels and (2) allow for 2[degrees]F (1.
As a result, the maximum relative airflow must be constrained to 1.
Equation 22 can be used to determine the required fan settings for a given total relative airflow.
The conversion process between a relative airflow setpoint and the discrete fan control involves choosing the set of discrete fan settings from the table that produces a tower airflow closest to the desired flow, assuming that airflow is proportional to fan speed.
According to Equation 22, the fan-speed setting if all cells are operating is equal to the relative airflow setpoint.
Then, for each entry in the table, the required fan control settings for the variable-speed fans that give the required relative airflow are determined using Equation 22, assuming that all the variable- speed fans operate at the same speed (see step 2).
Following the relative airflow speeds in the molecule layers further from the surface, it may be noted that these increase.