Numerical and experimental study towards a novel torque damper with minimized air flow instability

Abstract

The integration of air volume measurement and control has become a trend. However, one of the challenges in researching the integration of measurement and control dampers is that the coupling effect between local components (e.g., dampers, elbows, reducers and tees) in the duct system exerts a substantial effect on the measurement. This paper optimizes traditional damper measurement equipment through numerical simulation and experimental verification to solve this problem. First, the effect of different connection methods between the elbow and the damper on the air volume monitoring accuracy of the traditional torque damper is discussed. The measurement error range is −23.0–15.7%. In addition, this paper proposes a novel torque damper by combining the perforated plate with the damper and optimizing the structure (the porosity shall not exceed 60%). It effectively eliminates the coupling effect between local components and achieves accurate air volume monitoring, with an error range of ±5%. The work described in this paper provides a reference for research on the integration of air volume measurement and control and improves the practicality of torque dampers.