03113cas a2200385 a 4500 20260817172101.0 110910s1985 th uu|m rtt 0| a1eng d .b10126740 AIT Thesis no.AE-85-06 Murugaboopathi, C. Calibration of sprinkler to simulate tropical rainfall Bangkok : Asian Institute of Technology, 1985 78 p. Thesis ; no. AE-85-06 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development Thesis (M.Eng.) - Asian Institute of Technology, 1985 The study aims at calibrating sprinkler nozzles to simulate tropical rainfall with respect to rainfall characteristics such as intensity. distribution uniformity, dropsize distribution, kinetic energy and momentum. The "Rainjet 836c" square pattern sprinkler nozzle was selected for this purpose. One, two, three and four nozzle arrangements were used and the rainfall of different intensities was obtained by varying the gate valve pressure. The simulated rainfall was within the intensity range of 18.84mm/hr to 95.05mm/hr and the distribution uniformity was between 75.68 percent to 93.26 percent. The relationship between the drop mass and pellet mass was investigated using a drop forming apparatus and a "Mass Ration Curve" was developed, showing the relationship between pelletmass and massratio, the ration of the drop mass to pelletmass. The mass ratio curve was used to analyse the dropsize distribution of the simulated rainfall. Eight sets of measurements were made for the dropsize distribution and the results imply that the distribution of the drops follows the Gumbel distribution. The median volume drop diameter ranges between 1.69mm -2.15 mm. The kinetic energy and momentum of the simulated rainfall were also evaluated and momentum of the simulated rainfall were also evaluated and the values obtained are much higher than for actual rainfall because of the pressure and velocity energy in the nozzle. Rain-making Jensen, Jens Raunso, Chairperson Eppendorfer, W.H., Examintion Committee Rahman, Md. Ataur, Examintion Committee Canadian International Development Agency, (CIDA-BBD), Scholarship Donor Asian Institute of Technology. Thesis ; no. AE-85-06 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B19917 .b10126740 mnait s 240411 2 951012 m a s 0 mnait mnarc 22 40 Barcode : 30050120582498 CREATED : 2014-07-02 RECORD # : i12759594 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050120303374 CREATED : 2016-05-25 RECORD # : i12992756 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 14741 14741 0 0 0 0 MAIN MAIN mnait 2026-08-17 50.00 0 AIT Thesis no.AE-85-06 30050120582498 2026-08-17 17:21:01 3 2026-08-17 22 0 0 0 0 MAIN MAIN mnarc 2026-08-17 0 AIT Thesis no.AE-85-06 30050120303374 2026-08-17 17:21:01 2026-08-17 40