The phrase "average air velocity" is correct and usable in written English.
It can be used in contexts related to physics, engineering, or environmental science when discussing the speed of air in a given area or system.
Example: "The average air velocity in the ventilation system was measured to ensure optimal performance."
Alternatives: "mean air speed" or "typical air flow rate.".
It is also demonstrated that the capacity reduction rate is increased as the average air velocity decreases.
The model average air velocity was validated using experimental results in a wind tunnel with two artificial model trees of 24 cm height.
The best case (Case C4) increased the average air velocity and overall heat transfer rate of the base case (Case A) by approximately 10.3% and 5.3%, respectively.
In the study case, through the optimization of the airflow blocking boards and the guide boards, the average air velocity in the freezing zone would be enhanced to 2.5 2.7 times compared with the original design.
The CFD simulation results were used to develop a new correlation for pressure drop due to cars inside the tunnel as a function of tunnel average air velocity and tunnel length.
The results demonstrated that the differences between the mean radiant temperature and air temperature were between 0.8 °C and 5.3 °C in summer and between 1.6 °C and 11.0 °C in winter, and the average air velocity generally ranged from 0.3 m/s to 1.5 m/s.
The recommended average air velocities in dry and wet channels should not be greater than 1.77 m/s and 0.7 m/s, respectively.
Figure 5 shows the comparisons of the average air velocities measured from the fixed-point traverse and the moving traverse.
The measured average air velocities from the two methods match very well, especially in the range of 0.5 1.5 m/s (100 300 fpm).
Measurement results demonstrate that differences in the measured average air velocities between the moving traverse method and the fixed-point traverse method exist at a cross section where the air velocity spans a wide range.
As can be seen in Fig. 5, the average air velocities from fixed point traverse and moving traverse are very close at both measuring locations A26 and A27, although both the measured air velocities are above 2.0 m/s (400 fpm).
