Abstract

Evacuators are key components of gun barrels, and their main function is to drain the gunpowder gas remaining in the gun bore from the muzzle by ejection. To design an efficient evacuator for the gun barrels, an optimization model with the mathematical expressions describing the working process of the evacuator was established. The four structural parameters that affect the efficiency of the evacuator, including the volume of the gas storage cylinder chamber, the distance of the nozzle from the muzzle end face, the cross-sectional area of the nozzles and the cross-sectional area of the valves, were optimized. The effective working time and reliability indicator of the optimized evacuator were improved. This work describes a framework for improving the design of highly efficient evacuators on gun barrels.

Issue Section:
Technical Briefs
Keywords:
evacuator, optimization design, pumping time, structural parameters, gun barrel
Topics:
Design, Gun barrels, Optimization, Nozzles, Cylinders, Storage, Valves

References

1.
Peterson
,
K. G.
,
Nagamatsu
,
H. T.
,
Messitt
,
D. G.
,
Myrabo
,
L. N.
,
Andrade
,
C.
, and
Bendick
,
J.
,
1995
, “
Experimental Performance of Improved Ejector Nozzle Configurations for Gun Bore Evacuator Ejector Pumps
,”
AIAA
Paper No. AIAA-95-2209.10.2514/6.1995-2209
Google Scholar
Crossref
Search ADS
 
2.
Fu
,
J. P.
,
Zheng
,
J.
, and
Wu
,
X. B.
,
1999
, “
Analysis and Calculation of Pumping Efficiency of Evacuators
,”
J. Gun Launch Control
, (
1
), pp.
26
–
31
.
3.
Yu
,
C. G.
, and
Li
,
P. C.
,
1998
, “
Discussion on Calculation Method of Working Area of the Nozzle in Evacuators
,”
J. Gun Launch Control
, (
4
), pp.
12
–
17
.
4.
Yu
,
C. G.
,
Li
,
P. C.
, and
Liu
,
W.
,
1999
, “
Research on the High-Efficiency Bore Evacuator
,”
J. Ballistics
,
11
(
1
), pp.
65
–
70
.
5.
Li
,
J.
,
1998
, “
Calculation and Research on the Working Area for the Nozzle of the Charge-Varying Flow Device
,”
J. Basic Sci. Eng.
,
6
(
1
), pp.
97
–
102
.
6.
Li
,
J.
,
Yu
,
C. G.
, and
Yan
,
W. B.
,
1998
, “
Design and Experimental Study of High Efficiency Evacuators for Variable Charge
,”
J. Gun Launch Control
, (
1
), pp.
40
–
44
.
7.
Nagamatsu
,
H. T.
,
Duffy
,
R. E.
, and
Andrade
,
C. A.
,
1990
, “
Generic Gun Bore Evacuators I. Experimental and Aerodynamic Investigations
,”
Proceedings of the Sixth U.S. ARMY Symposium on Gun Dynamics
,
USA, DTIC
, Tamiment, PA, May 14–17, pp.
18
–
40
.
8.
Nagamatsu
,
H. T.
,
Myrabo
,
L. N.
,
Messitt
,
D. G.
,
Ekonomidis
,
C.
, and
Greenman
,
M.
,
1995
, “
An Experimental Investigation of the Gas Dynamic Performance of Gun Bore Evacuators Mounted on 155-mm Self-Propelled Howitzers
,” U.S. ARMY Armament Research Development and Engineering Center, Watervliet, NY, Report No.
ARCCB-CR-95019
.https://apps.dtic.mil/sti/citations/ADA301002
9.
Rivera
,
M.
, and
Sneck
,
H. J.
,
1993
, “
Pressure Distribution and Pumping Force of Discharging Bore Evacuator Holes
,”
Proceedings of the Seventh U.S. Army Symposium on Gun Dynamics
,
Newport, RI
, May 11–13, pp.
11
–
28
.https://www.semanticscholar.org/paper/Pressure-Distribution-and-Pumping-Force-of-Bore-Sneck-Rivera/bca365d891a4c0625ee5221e52cbc6f1244556c9
10.
Sun
,
C. Z.
,
2019
, “
Performance Analysis and Simulation Software Design of Self-Propelled Gun Evacuator
,” M.S. thesis,
University of Electronic Science and Technology
, Chengdu, China.
11.
Du
,
Z. H.
, and
Di
,
C. C.
,
2009
, “
Research on Certain Bore Evacuator Efficiency Problem Based on Simulation Technology
,”
Mech. Eng.
, (
12
), pp.
26
–
30
.
12.
Man
,
J. J.
,
2015
, “
Technology Research to Improve the Bore Evacuator
,” M.S. thesis,
North University of China
,
Taiyuan, China
.
13.
Pei
,
Q. X.
, and
Foo
,
R.
,
2001
, “
Modeling and Simulation of the Gas Charging and Discharging Processes on Gun Bore Evacuator
,”
Proceedings of 19th International Symposium of Ballistic
,
Interlaken, Switzerland
, May 7–11, pp.
281
–
288
.https://www.semanticscholar.org/paper/MODELING-AND-SIMULATION-OF-THE-GASCHARGING-AND-ON-Pei-Foo/ea8468df65dca36702bb71ac253b3e105a3ea5f3
14.
Andrade
,
C. A.
,
Manhardt
,
P. D.
,
Schaub
,
E. G.
,
Clauss
,
C. W.
, and
Baker
,
A. J.
,
1993
, “
120 mm Gun Bore Evacuation Simulated by Finite Element CFD
,”
Proceedings of the 30th JANNAF Propulsion Meeting
,
Monterey, CA
, Nov.
15
–
19
.
15.
Du
,
Z. H.
, and
Di
,
C. C.
,
2009
, “
Research on Certain Big Caliber Self-Propelled Gun Bore Evacuator Efficiency Problem Based on System Model
,”
Machines
,
36
(
12
), pp.
20
–
25
.
16.
The Chinese People's Liberation Army 412 Unit,
1975
, Artillery Design Manual, China.
17.
Roeck
,
D. M.
, “
Bore Evacuator for Artillery Type Guns
,” U.S. Patent 3122055, 1964-2-25.
18.
Austin
,
W. H.
, and
Trudeau
,
D. F.
, “
Split Ring Valve for Bore Evacuator
,” U.S. Patent 3377918, 1968-4-16.
19.
Wellington
,
R. H.
, and
Herman
,
P. M.
, “
Bore Evacuator for Gun Barrels
,” U.S. Patent 2807986, 1957-10-1.
20.
Fu
,
J. P.
,
Dong
,
W. H.
, and
Ji
,
Q.
,
2006
, “
Improvement on Ablation and Erode of Mechanized Gun Evacuator
,”
J. Ballistics
,
18
(
4
), pp.
64
–
67
.
21.
Orlov
,
1982
,
Structure and Design of Gun Barrels
,
Defense Industry Press
,
Beijing, China
.
22.
Mehrotra
,
S.
,
1992
, “
On the Implementation of a Primal-Dual Interior Point Method
,”
SIAM J. Optim.
,
2
(
4
), pp.
575
–
601
.10.1137/0802028
Google Scholar
Crossref
Search ADS
 
Copyright © 2021 by ASME
You do not currently have access to this content.