000 03113cas a2200385 a 4500
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008 110910s1985 th uu|m rtt 0| a1eng d
035 _a.b10126740
099 9 _aAIT Thesis no.AE-85-06
100 1 _aMurugaboopathi, C.
245 1 0 _aCalibration of sprinkler to simulate tropical rainfall
260 _aBangkok :
_bAsian Institute of Technology,
_c1985
300 _a78 p.
490 1 _aThesis ;
_vno. AE-85-06
500 _aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development
502 _aThesis (M.Eng.) - Asian Institute of Technology, 1985
520 _aThe 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.
650 0 _aRain-making
700 1 _aJensen, Jens Raunso,
_eChairperson
700 1 _aEppendorfer, W.H.,
_eExamintion Committee
700 1 _aRahman, Md. Ataur,
_eExamintion Committee
710 2 _aCanadian International Development Agency, (CIDA-BBD),
_eScholarship Donor
810 2 _aAsian Institute of Technology.
_tThesis ;
_vno. AE-85-06
856 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B19917
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