Static Pressure Distribution
7.3 RECOMMENDATIONS FOR FUTURE WORK
The condition of the experimental facility slowly deteriorated over the period of testing, with the most concerning problem being the oil leak in the hydraulic motor. The funding for any repair or replacement would exceed that given for the project. This problem, along with various other minor issues, proved that the facility needs a major reconstruction and the equipment to be modernised before any implementation of different methods and techniques to acquire heat transfer data. Ideally an allowance for all the sensors to be sampled at the same time would be needed, which is not possible with the current system. This system needs many hours for all the sensors to be finally sampled, and the base test conditions and temperatures fluctuate with the inconsistent compressor blade speeds. This would lead to unfavourable experimental errors.
This facility would need a major overhaul if research is to successfully continue. The deteriorating conditions of the rig would only lead to inaccuracies of results and the eventual
breakdown of key components that would allow continuous safe running and generation of results. The damaged sensors and lack of resolution in these areas would mean that another re- instrumentation of the blade would be necessary, including investigating a safer method of the plunging mechanism such that there would be no reoccurrence of this problem.
The problematic hydraulic drive could be replaced altogether, with a DC drive motor, for example, to run the centrifugal compressor. This would also allow the user to remain in the plenum room and adjust the compressor blade speed, whereas currently the user has to leave the room to attend to the hydraulic drive and manually adjust the angle of the swash-plate from there.
When the facility is running in a condition where there would be more research than repair, the implementation of the numerical heat transfer data acquisition system would be recommended, together with automated control of certain components of the facility (and the upgrade and replacement of the ageing equipment) that would allow for constant operating conditions and minimal experimental error.
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