Downloaded from https://www.everyspec.com TABLE OF CONTENTS-(continued) CHAP-Tmt 3 1 EA'T TRANSFER, TEM PERATURE DISTRIBUTION ANI) EROSION 01' GUN TUBES Paragraph Page IST OF SYMBOS . .... ................... 3-1 3-1 Heat Transfet ............... ...................... 3-2 3- I. ! ( ;1(ra I)is('ussion ........ .................... .. 3-2 3-i .2 H heat Transfer Coefficient ...... ................. ... 3-2 3-1.3 Cal"culation of the Rate of Heat Input .... ........... ... 3-3 3-1.4 Nondimn.sional Heat Transfer Coefficient ...... .......... 3-5 3-2 "emperatw;re Distribution ......... .................. 3-6 3-2.1 The E"quations of Temperature D)istribution in Reduced Varial)hes ...............
........................ 34- 3-2.2 lHeat Input . . . . . . . . . . . . . . . . . . . . . . . . :3-7 3-2.3 The "Thermal Analyzer' ........... ............... 3-7 :-2.4 Compaiisoi With Experiment ..... ................. 3-8 3_-3 l.]rosioi . ....................... * 3-8 .- 3.1 (veneral )i'eussion ......... .................... 3-8 3-3.2 Estimation of the Erosion of Gun Tuel..s ............... 3-9 3-3.3 Life of G(u Tubes ........... .................... 3-14 3-3.4 Erosion in Vents ......... ....................... 3-14 RiEI'EIRENCES ................. . ............ 3-21 EIXIEINI ENTAI, NIETIIODS C(um.i'rp: 4 LIST ()OF SYMBOLS ............ ................... 4-1 4-1 hItIroiction .............
........................ 4-2 4-2 I'r(,.stre' Measuirements . . ........... ................... 4-2 4-2.1 General Principles ............. .................... 4-2 4-2.2 Ilhe( Quartz IPiezoelectri('c Gage ...... .............. ... 4-3 4-2.3 Strain Ty[e lre'ssure Gages .......... ................ 4-5 4-2.4 ('Csher Gag(e . ......... ..................... ... 4-8 4-3 Measurement of Muzzle Velocity..... . .............. .. 4-9 4-:3. 1 (General Principles ........... .................... .. 4-9 4-3.2 Chronographs ........... ...................... .. 4-10 4-3.3 Detecting D1evices .......... .................... .. 4-12 -1-3.4 The Calculation of the, Muzzle \eloity .............. .. 4-12 4--4.
1 Barrel Contacts .......... ..................... .4-14 4-4.2 Mi(crowave Interferometer . ........ ................ 4-14 -1-4.3 Measurement of Projectile Travel Near the Start of Motion . 4-17 .4-4 Travel-Time Measurements ........ ................. .. 4-14 1-.5 In-loro, Veloity :and Acc(,lhration ,Measurement ........... .. 4-17 -4-5 .1 l)iiferentiation of the Travel-Time D)ata .............. .. 4-17 41-5.2 Th'le(, Measurement of Velocity ..... ............... .. 4-18 .I. 5.3 The Measurm'ent of Aeceleration .... ............. . 1-14) S.-1; The' \[Teasuin(,en t of lias, lP'esshure . ....... ............. . -.