National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
The lab experiment was carried out to study the performance and characteristics of a Francis turbine test rig, in the Hydraulics Lab of the College Agricultural Engineering under Dr. Rajendra Prasad Central Agricultural University, Pusa (Bihar) India. The performance of the rig was evaluated at various loads ranging from 0 to 7.0 kg at a constant head of 7.68 m, 0 to 5.0 kg at a constant head of 9.09 m and 0 to 4.0 kg at a constant head of 10.22 m of water, respectively. Results showed that as the loads applied increases, the water flow rate and input power to the rig increases, reaches up to the peak and then decreases at constant heads. Inverse relationship was observed between the torque developed due to the loads applied and the speed of the runner of the turbine operating at a constant head. The excellent correlation between the torque generated and the speed were found to be 99.87 % at constant heads of 7.68 m and 9.09 m; and 99.80 % at constant head of 10.22 m of water. As the load applied increases, the torque developed increases but at the same time speed of the runner of the turbine decreases. The output power developed by the rig increases with increase in load applied and reaches up to the peak values of 0.212 HP at load of 4.0 kg, 0.534 HP at load of 5.0 kg and 0.277 HP at load of 3.0 kg at constant heads of 7.68 m, 9.09 m and 10.22 m of water, respectively and then decreases. The efficiency of the rig increases and reaches up to the maximum values of 32.23 %, 39.09 % and 37.56 % at the same value of load of 4.0 kg and at constant heads of 7.68 m, 9.09 m and 10.22 m of water, respectively and then decreases.
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