Compressor system with resonator

1. A compressor system, comprising:

a compressor structured to discharge a flow of pressurized gas;

a discharge pipe in fluid communication with the compressor, wherein the discharge pipe is structured to conduct the pressurized gas toward a desired location; and

an annular ring inserted into the discharge pipe, wherein the annular ring has an internal passage structured to conduct the pressurized gas from the compressor therethrough,

wherein the annular ring includes a resonator in fluid communication with the internal passage,

wherein the resonator is configured to reduce pressure fluctuations in the flow of pressurized gas discharged by the compressor,

wherein the resonator includes a cavity, having a volume and an area, and a neck having a length and an orifice size, and wherein the cavity is in fluid communication with the internal passage via the neck; and

wherein the neck extends opposite the internal passage from a surface adjacent the internal passage.

2. The compressor system of claim 1 , wherein the annular ring is an integral structure and is separate from and supported by the discharge pipe.

3. The compressor system of claim 1 , wherein the annular ring includes a plurality of resonators circumferentially spaced apart about the annular ring.

4. The compressor system of claim 1 , wherein the resonator is tuned to attenuate a desired frequency by varying one or more of the volume, the area, the length and the orifice size.

5. The compressor system of claim 1 , wherein the annular ring includes a first circumferential row of resonators circumferentially spaced apart about the annular ring.

6. The compressor system of claim 5 , wherein each resonator in the first circumferential row of resonators is tuned to attenuate acoustic waves of the same frequency.

7. The compressor system of claim 5 , wherein the annular ring includes a second circumferential row of resonators circumferentially spaced apart about the annular ring.

8. The compressor system of claim 7 , wherein the resonators of the first circumferential row of resonators are tuned to attenuate one or more different frequencies than the resonators of the second circumferential row of resonators.

9. The compressor system of claim 7 , wherein each resonator of the first circumferential row of resonators is tuned to attenuate a first frequency, and wherein each resonator of the second circumferential row of resonators is tuned to attenuate a second frequency different from the first frequency.

10. The compressor system of claim 7 , wherein the second circumferential row of resonators is positioned adjacent to the first circumferential row of resonators.

11. The compressor system of claim 7 , wherein the annular ring includes a third circumferential row of resonators circumferentially spaced apart about the annular ring.

12. A compressor system, comprising:

a screw compressor;

a screw compressor discharge pipe having an outer surface and an internal passage disposed radially within the outer surface, wherein the internal passage is structured to conduct pressurized air discharged from the screw compressor therethrough; and

a plurality of resonators inserted between the outer surface and the internal passage, wherein each resonator includes an opening in fluid communication with the internal passage, wherein each resonator is structured to attenuate acoustic pressure waves at a predetermined frequency, the plurality of resonators include a cavity, having a volume and an area, and a neck having a length and an orifice size, and wherein the cavity is in fluid communication with the internal passage via the neck, and wherein the neck extends opposite the internal passage from a surface adjacent the internal passage.

13. The compressor system of claim 12 , wherein the plurality of resonators are arranged in a plurality of circumferential rows of resonators circumferentially spaced apart.

14. The compressor system of claim 13 , wherein at least one circumferential row of resonators is structured to attenuate acoustic pressure waves at a different frequency than at least one other circumferential row of resonators.

15. The compressor system of claim 13 , wherein the plurality of resonators are formed as part of an integral structure and are separate from and supported by the discharge pipe.

16. The compressor system of claim 12 , wherein the plurality of resonators are formed as part of an integral annular ring defined between the internal passage and the outer surface.

17. The compressor system of claim 16 , wherein the annular ring is formed by an additive manufacturing process.

18. A compressor system, comprising:

a compressor operative to discharge pressurized air having acoustic pressure waves therein;

a discharge pipe in fluid communication with the compressor, wherein the discharge pipe is configured to conduct the pressurized air toward a desired location; and

one or more resonators structured to reduce amplitudes of the acoustic pressure waves at one or more preselected frequencies, the one or more resonators disposed within the discharge pipe, the one or more resonators including a cavity, having a volume and an area, and a neck having a length and an orifice size, wherein the cavity is in fluid communication with an internal passage of the discharge pipe via the neck, and wherein the neck extends opposite the internal passage from a surface adjacent the internal passage.

19. The compressor system of claim 18 , wherein the one or more resonators are formed as part of an integral structure and are separate from and supported by the discharge pipe.