The BCR intercomparison MTR 077 "In-duct noise measurements on fans" terminated in 1988. A natural follow-up of this project is to extend it to other installation situations such as free-inlet/free-outlet, free-inlet/ducted-outlet and ducted-inlet/free-outlet. As no specific internationally agreed standard exists, it is expected that the project will have major influence on standardization. Two test fans will be circulated between the participants, one a belt driven centrifugal fan and the other an axial fan with close-coupled motor mounted in the airflow. The fans will be mounted in test rigs assembled from a standard set of ducting to be circulated with the fans. This will ensure identical installation conditions for every measurement. The two fans are the same as have been used in the earlier intercomparison together with, as far as possible, the ducting used earlier. This will enable direct comparison with results from the earlier intercomparison concerning measurement of sound power inside ducts. Each of the participating laboratories will use its own noise measurement instrumentation to determine the noise levels of the fans both in-duct and at the open inlet or outlet.
The two fans are currently being circulated.
Funding SchemeCSC - Cost-sharing contracts