(13-39) In “The Effect of Nozzle Design on the Stabil- ity and Performance of Turbulent Water Jets” (Fire Safety Journal

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13 39 In The Effect Of Nozzle Design On The Stabil Ity And Performance Of Turbulent Water Jets Fire Safety Journal 1 (160.48 KiB) Viewed 28 times

(13-39) In “The Effect of Nozzle Design on the Stabil- ity and Performance of Turbulent Water Jets” (Fire Safety Journal, August 1981, Vol. 4), C. Theobald described an experiment in which a shape measurement was determined for several different nozzle types at different levels of jet efflux velocity. Interest in this experiment focuses primarily on nozzle type, and velocity is a nuisance factor. The data follow. (a) Does nozzle type affect shape measurement? Compare the nozzles with box plots and the analysis of variance. (b) Use Fisher's LSD method to determine specific differ- ences among the nozzles. Does a graph of the average (or standard deviation) of the shape measurements versus nozzle type assist with the conclusions? (c) Analyze the residuals from this experiment. Jet Efflux Velocity (m/s) Nozzle Type 11.73 14.37 16.59 20.43 23.46 28.74 001 0.78 0.80 0.81 0.75 0.77 0.78 Stroom 2 0.85 0.85 0.92 0.86 0.81 0.83 3 0.93 0.92 0.95 0.89 0.89 0.83 4 1.14 0.97 0.98 0.88 0.86 0.83 59 0.97 0.86 0.76 0.76 0.75 0.78 Ho