What types of mechanical energy losses occur during the operation of industrial duct fans?

In fact, there are many issues related to mechanical energy losses during the operation of industrial duct fans, the most significant of which are flow losses, leakage losses, and impeller resistance losses. For reference, let’s explore this topic. First, it is important to understand what flow losses are primarily caused by the viscosity of the gas in an industrial duct fan system. A portion of the airflow passes through several different channels from the inlet to the outlet. During this process, some friction losses occur along the way. Additionally, other losses result from vortex shedding. Beyond these, there are losses during the air intake process and losses due to the impeller’s airflow direction. The second issue is leakage. In practice, there is a certain clearance between the stationary and rotating parts of an industrial duct fan to ensure proper operation. However, these clearances can also lead to air leakage. Generally, leakage caused by the gap between the fan shaft and the housing is referred to as external leakage. So, what are wheel resistance losses? We know that these are related to the flow of air during the operation of an industrial duct fan. However, due to the viscosity of the airflow itself, friction occurs between the air and the front and back surfaces of the impeller, as well as between the impeller surface and the surrounding airflow, during the impeller’s rotation. This is referred to as impeller resistance loss. The above briefly introduces several potential mechanical energy loss issues that may occur during the operation of industrial duct fans. It would be ideal if, based on an understanding of these concepts, you could gain a better understanding of the machine and use it more effectively.