Abstract
The paper deals with the issues of mathematical modeling of gas-dynamic and thermophysical processes occurring in the internal (working) volume of the air heat curtain (AHC) with a tangential fan. The flow structure in the form of current lines, fields of pressure, temperature, and gas velocity at fan speeds 250 rpm and 1000 rpm are given. It is shown that the structure of the flow does not depend on the fan rotation speed, the speed profiles are self-similar, and the temperature field is invariant concerning the fan rotation speed. Thus, optimization of the air heat curtain structural elements can be carried out at the fixed value of impeller rotation speed, as it does not affect parameters of the output jet. As a result of numerical simulation, it was found that the area of the return flow is formed on the cut of the output diffuser, which significantly reduces the output air jet performance.
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