Silencer Program | Fox Equipment

Turbine

Turbine Size

Gas Flow (pph)

Gas Temperature (°F)

Site Altitude AMSL (ft)

Calculated

Barometric pressure at altitude (in Hg)	-
Actually Gas Density (pcf)	-
Gas Flow (acfm)	-

Pressure Drop

Nose In
Perforated Baffle Section
Nose Out
Tail Out
Total Predicted PD (Nose Out/Tail Out)	- / -

Relatively ideal pressure drops. Based on developed flow upstream of baffles.

Parallel Baffle Inserts

Stack Shape

Stack Diameter (in)

Number of Baffles

Free Area %

Active Length (in)

Calculated Silencer Information

Thickness of Liner (in)	- / -
Width of Air Channel (in)	- / -
Baffle Width (in) (E)	-
Gap (in) [Middle (A) / End (B)]	- / -
Baffle Thickness (in)	-
Module Width (in)	-
Area of Square (sq ft)	-
Area of Circle (sq ft)	-
Ratio	-
Module Size (in)	-
Face Velocity (FPM/FPS)	- / -
Gap Velocity (FPM/FPS)	- / -
Gap Velocity Pressure (in wc)	-

Silencer Width is key variable in determining acoustic performance.

For a given stack Width, modify the number of baffles and free area to target baffles 12 inches to 16 inches wide.

Maintain gap velocities under 10,000 FPM for 900°F+ exhaust gases.

Silencer Table

id	Half_Baffle	Half_Gap	GAP_Percent	Lnth	Temp	Octave_31_5	Octave_63	Octave_125	Octave_250	Octave_500	Octave_1000	Octave_2000	Octave_4000	Octave_8000
1	5	5	50	96	800	1	2.20	6.90	13.10	20.50	34.20	46.00	21.00	18.00
2	5	5	50	96	850	1	1.80	6.90	12.80	19.60	33.00	49.50	22.00	17.00
3	5	5	50	96	900	1	1.40	6.80	12.40	19.00	32.10	50.50	23.00	17.00
4	5	5	50	96	950	1	1.10	6.80	12.10	18.60	30.90	52.00	23.00	17.50
5	5	5	50	96	1,000	1	1.00	6.70	11.80	18.00	20.20	54.00	24.00	15.00
6	6	6	50	96	800	1	3.50	6.90	11.30	17.80	31.10	36.00	19.00	15.00
7	6	6	50	96	850	1	3.00	6.80	11.00	17.10	30.00	38.00	19.50	15.00
8	6	6	50	96	900	1	2.60	6.70	10.70	16.50	29.00	39.00	20.00	15.00
9	6	6	50	96	950	1	2.20	6.50	10.50	16.20	27.90	40.00	20.00	15.00
10	6	6	50	96	1,000	1	1.90	6.40	10.20	15.70	27.00	41.00	20.00	16.00
11	7	7	50	96	800	1	4.40	6.50	9.90	16.00	28.40	29.00	17.50	15.00
12	7	7	50	96	850	1	3.90	6.30	9.70	15.50	27.50	30.00	18.00	15.00
13	7	7	50	96	900	1	3.40	6.20	9.40	14.90	26.50	31.00	18.00	15.00
14	7	7	50	96	950	1	3.00	6.00	9.20	14.60	25.60	32.00	18.00	15.00
15	7	7	50	96	1,000	1	2.60	5.90	8.90	14.10	24.70	33.00	18.50	15.00
16	8	8	50	96	800	1	4.90	5.90	9.00	14.70	26.30	24.00	15.00	14.00
17	8	8	50	96	850	1	4.50	5.80	8.70	14.10	25.30	25.00	15.00	14.00
18	8	8	50	96	900	1	4.00	5.60	8.50	13.70	24.60	26.00	15.00	14.00
19	8	8	50	96	950	1	3.60	5.50	8.20	13.30	23.70	27.00	16.00	14.00
20	8	8	50	96	1,000	1	3.20	5.40	8.10	13.00	23.00	27.00	16.00	15.00
21	5	5	50	120	800	1	3.90	8.50	16.10	25.00	41.30	52.00	25.00	19.00
22	5	5	50	120	850	1	3.40	8.40	15.70	24.10	39.90	55.00	25.00	19.00
23	5	5	50	120	900	1	2.90	8.30	15.20	23.30	38.80	60.00	25.00	18.00
24	5	5	50	120	950	1	2.55	8.20	14.80	22.70	37.30	60.00	26.00	19.00
25	5	5	50	120	1,000	1	2.00	8.10	14.50	22.10	36.60	60.00	27.00	19.50
26	6	6	50	120	800	1	5.20	8.50	13.80	21.60	37.60	40.00	20.50	17.00
27	6	6	50	120	850	1	4.80	8.30	13.50	20.90	36.30	43.00	21.00	17.00
28	6	6	50	120	900	1	4.30	8.20	13.20	20.20	35.00	45.00	21.00	18.00
29	6	6	50	120	950	1	3.80	8.00	12.80	19.70	33.70	46.00	21.00	18.00
30	6	6	50	120	1,000	1	3.40	7.90	12.50	19.10	32.70	49.00	22.00	17.00
31	7	7	50	120	800	1	6.00	7.90	12.10	19.40	34.50	32.00	19.00	15.00
32	7	7	50	120	850	2	5.00	8.30	12.10	19.00	35.50	34.00	19.00	15.00
33	7	7	50	120	900	1	5.20	7.50	11.40	18.10	35.00	35.00	19.00	15.00
34	7	7	50	120	950	1	4.70	7.40	11.20	17.70	32.00	37.00	19.50	15.00
35	7	7	50	120	1,000	1	4.20	7.20	10.90	17.20	32.00	39.00	19.80	15.00
36	8	8	50	120	800	1	6.20	7.30	10.90	17.80	31.90	28.00	18.00	15.00
37	8	8	50	120	850	1	6.00	7.10	10.60	17.20	30.70	29.00	17.00	15.00
38	8	8	50	120	900	1	5.60	6.90	10.30	16.70	29.70	29.80	18.00	15.00
39	8	8	50	120	950	1	5.20	6.70	10.00	16.10	28.70	30.00	18.00	15.00
40	8	8	50	120	1,000	1	4.80	6.60	9.80	15.80	27.80	31.00	18.00	15.00
41	5	4	45	96	800	1	2.10	7.50	14.10	22.10	36.80	54.00	25.00	18.00
42	5	4	45	96	850	1	1.60	7.40	13.80	21.40	35.40	56.00	26.00	18.00
43	5	4	45	96	900	1	1.20	7.40	13.40	20.70	34.60	60.00	26.00	18.00
44	5	4	45	96	950	1	1.00	7.30	13.10	20.40	33.30	60.00	26.50	18.50
45	5	4	45	96	1,000	1	1.00	7.20	12.80	19.60	32.50	60.00	27.00	19.00
46	6	5	45	96	800	1	3.50	7.50	12.30	19.30	33.20	42.00	20.50	16.50
47	6	5	45	96	850	1	3.00	7.30	12.00	32.00	33.50	45.00	21.00	17.00
48	6	5	45	96	900	1	2.50	7.20	11.70	17.90	30.90	46.00	21.00	17.00
49	6	5	45	96	950	1	2.10	7.10	11.40	17.60	29.80	47.50	21.50	18.00
50	6	5	45	96	1,000	1	1.70	7.00	11.10	17.00	28.90	49.50	23.00	18.00
id	Half_Baffle	Half_Gap	GAP_Percent	Lnth	Temp	Octave_31_5	Octave_63	Octave_125	Octave_250	Octave_500	Octave_1000	Octave_2000	Octave_4000	Octave_8000