Tham khảo tài liệu 'power plant acoustics episode 11', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | TM 5-805-9 AFM 88-20 NAVFAC APPENDIX A DATA FORMS A blank copy of each of the data forms prescribed in this manual DD Forms 2304 and 2305 can be located in appendix A. For Army DD Forms 2304 and 2305 will be reproduced locally on 8 1 2 inch by 11 inch paper. Copies to be extracted for local reproduction are located in appendix A of this regulation. For Navy and Air Force copies are available through normal forms publica-tions supply channels. Appendix E TM 5-805-4 AFM 88-37 NAVFAC contains blank forms for DD Forms 2294 through 2303. TM 5 805 9 AFM 88-20 NAVFAC ESTIMATED SOUND POWER LEVEL OF DIESEL OR GAS RECIPROCATING ENGINE NOISE 1. Engine power rating 2 hp Engine speed range n under 6oo rpm A -5 600-1500 rpm A -2 3. Cylinder arrangement in-line c 0 v-type radial c -l c -l over 1500 rpm A 0 u. Engine 1 1 diesel and or gas fuel 1 1 1 1 natural gas only B 0 B -3 1 . Equipped with 1 1 yes turbocharger 1 1 T 6 T o 6. Air intake to unmuffled Roots blower yes D 3 no or not applicable D 0 7. Length of air intake duct if any ft. 8. Length of exhaust pipe L _ft. Octave Frequency Band in Hz 31 63 125 250 500 1000 2000 booo 8000 Part A. Engine casing noise. 9. Overall PWL from table 2-1 of PPA manual L Base PWL A B C D V Caution Use correct signs . dB re 10-12W 10. Octave frequency band adjustments from table 2-2 for engine speed of Item 2 above Octave band PWL values Item 11 Item 9 - Item L0 in bands Ị I 1 1 I 1 Part B. Turbocharged air inlet noise if applicable. 12. Overall PWL from table 2-3 of PPA manual if inlet duct has acoustic lining see Item 15 below L Base PWL - L 6 w in dB re 10-12W Octave frequency band adjustments from table 2-3 b 11 13 13 12 9 I 8 9 17 Octave band PWL values Item lb Item 12 - Item 13 in bands Insertion loss of duct lining or muffler in air inlet duct if applicable. If duct lining data are used here eliminate the L 6 term in Item 12 above. Octave band PWL radiated from intake nd of air inlet duct if applicable item 16
