NSWC/WOL TR 76-155 



3. CORRELATIONS WITH EXPERIMENTAL DATA 



3.1 SUMMARY OF TEST DATA AND COMPUTATION RESULTS . Tables 3.1.1 

 thru 3.1.4 summarize the input and output parameters of the computa- 

 tions of this report. These tables include all the test data for Spot 

 and White Perch obtained on the 1973 and 1975 test series in the 

 Chesapeake Bay. For the 1973 test data (the "500" Shot Numbers) the 

 fishes' horizontal ranges and depth which are listed in the tables 

 are the preset or intended values. 1 On the 1975 tests, shots 783 

 thru 786, water currents caused significant deviations in horizontal 

 range and depth. For these shots the preset values 2 have been 

 corrected as described in Appendix D. (Tables D-2 thru D-7 list 

 corrected values for charge depth and fish and pressure gage locations 

 for all shots of the 1975 test series.) 



The ambient pressure (Tables 3.1.1 and 3.1.2) is the total 

 hydrostatic head at fish depth calculated for fresh water, density = 

 1000 kg/m 3 , and nominal atmospheric pressure, 1.013 x 10 5 pascals. 

 The vapor pressure was calculated from the measured water temperature 

 (1975 tests) or estimated water temperature (1973 tests) . 



The peak pressure PMAX in pascals and time constant in 

 milliseconds are calculated from the similitude relations for 

 pentolite 



PMAX = PCORR x 5. 62 



/ T7 l/3\ 1.14 

 x 10 7 ^L_ J (3.1.1) 



' 1/3 fcfr) 



= 0.084 W x/J l-^\ °- 23 (3.1.2) 



where W is the explosive mass in kilograms, R is the slant range from 

 the charge in meters, and PCORR is an empirical constant that was used 

 to adjust Equation 3.1.1 for batch-to-batch variations in the explo- 

 sive charges. For the 1973 test series PCORR = 1.10 — for the 

 1975 tests PCORR = 0.95. 



(Text continued on naae 32) 



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