Characteristics of Muzzle Shock Wave Overpressure on the Surface of Vehicle-mounted Howitzer’s Crew Compartment

doi:10.12382/bgxb.2023.0687

Abstract

Abstract:

The shock wave overpressure acting on the surface of crew compartment during artillery firing is a key boundary condition for studying the protective performance of vehicle-mounted howitzer’s crew compartment against muzzle shock wave. To explore the characteristics of muzzle shock wave overpressure on the surface of crew compartment, a systematic firing experiment plan is designed for a specific equipment. The experiments cover both the main and auxiliary firing sectors of vehicle-mounted howitzer, capturing the overpressure data of the shockwaves at different positions on the crew compartment under seven firing angle conditions. The attenuation patterns of shock wave overpressure on the crew compartment surface at various spatial locations relative to the muzzle and crew compartment were obtained through experiment. A computational model of muzzle blast flow field is established using the unsteady three-dimensional inviscid Euler equations. Simulation and numerical analysis are performed to evaluate the shock wave overpressure on the crew compartment surface under extreme conditions.The simulated results show good agreement with the experimental data in terms of the change trend of shock wave overpressure, with a peak overpressure error of less than 4% when the muzzle airflow velocity is properly considered. The research results indicate that the muzzle shock wave influenced by the ground and the structure of crew compartment, forms a secondary overpressure distribution with obvious peaks on the surface of vehicle-mounted howitzer’s crew compartment. Factors such as the orientation of muzzle brake vents and the raised structures on the crew compartment contribute to a more severe muzzle shock wave overpressure on the surface of crew compartment.

Key words: truck-mounted howitzer, muzzle shock wave, surface of crew compartment, overpressure characteristic

CLC Number:

TJ301

WEI Shengcheng, QIAN Linfang, XU Yadong, YIN Qiang. Characteristics of Muzzle Shock Wave Overpressure on the Surface of Vehicle-mounted Howitzer’s Crew Compartment[J]. Acta Armamentarii, 2024, 45(11): 3792-3805.

Figures/Tables 19

References 23

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发次序号、均值、极差与相对极差	0°/-25°射角下测点超压峰值/kPa				0°/-25° 射角下弹丸初速/(m·s^-1)	14°/0°射角下测点超压峰值/kPa				14°/0° 射角下弹丸初速/(m·s^-1)
发次序号、均值、极差与相对极差	测点1	测点2	测点3	测点4	0°/-25° 射角下弹丸初速/(m·s^-1)	测点1	测点2	测点3	测点4	14°/0° 射角下弹丸初速/(m·s^-1)
1	129	327	126	-	951.4	192		205	167	939.0
2	132	306	132	105	952.3	204		214	164	943.6
3	123	283	132	108	950.8	196		196	182	942.3
4	121	296	130	-	950.0	185		202	178	941.6
5	122	285	130	110	951.6	-		200	-	945.2
6	125	327	137	-	950.8	201		206	-	944.4
7	129	307	125	-	948.0	-		211	-	944.5
均值	125.8	304.4	130.3	107.7	950.7	195.6		204.9	172.7	942.9
极差	11	44	12	5	4.3	19		18	18	6.2
相对极差	8.7%	14.4%	9.2%	4.6%	0.45%	9.7%		8.7%	10.4%	0.65%

发次序号、均值、极差与相对极差	0°/-25°射角下测点超压峰值/kPa				0°/-25° 射角下弹丸初速/(m·s^-1)	14°/0°射角下测点超压峰值/kPa				14°/0° 射角下弹丸初速/(m·s^-1)
发次序号、均值、极差与相对极差	测点1	测点2	测点3	测点4	0°/-25° 射角下弹丸初速/(m·s^-1)	测点1	测点2	测点3	测点4	14°/0° 射角下弹丸初速/(m·s^-1)
1	129	327	126	-	951.4	192		205	167	939.0
2	132	306	132	105	952.3	204		214	164	943.6
3	123	283	132	108	950.8	196		196	182	942.3
4	121	296	130	-	950.0	185		202	178	941.6
5	122	285	130	110	951.6	-		200	-	945.2
6	125	327	137	-	950.8	201		206	-	944.4
7	129	307	125	-	948.0	-		211	-	944.5
均值	125.8	304.4	130.3	107.7	950.7	195.6		204.9	172.7	942.9
极差	11	44	12	5	4.3	19		18	18	6.2
相对极差	8.7%	14.4%	9.2%	4.6%	0.45%	9.7%		8.7%	10.4%	0.65%

序号	高低角/ 方向角/ (°)	测点1			测点2			测点3			测点4
序号	高低角/ 方向角/ (°)	距炮口/ m	最大超压峰值均值/ kPa	最大峰值时刻均值/ ms	距炮口/ m	最大超压峰值均值/ kPa	最大峰值时刻均值/ ms	距炮口/ m	最大超压峰值均值/ kPa	最大峰值时刻均值/ ms	距炮口/ m	最大超压峰值均值/ kPa	最大峰值时刻均值/ ms
1	14/0	2.17	195.6	3.77				2.40	204.9	4.12	2.36	172.7	3.95
2	30/0	4.09	77.7	8.92				3.86	62.1	7.7
3	51/0				6.74	43.6	15.72				5.56	74.2	12.77
4	65/0				8.20	35.5	20.33				6.99	56	16.83
5	65/-23.4	8.23	40.05	20.37				7.6	26.7	19.16
6	14/-25	3.01	108.8	4.89				2.13	210.6	3.48
7	0/-25	2.46	125.8	3.5	1.88	304.4	2.79	2.01	130.3	2.87	2.61	107.7	4.28

序号	高低角/ 方向角/ (°)	测点1			测点2			测点3			测点4
序号	高低角/ 方向角/ (°)	距炮口/ m	最大超压峰值均值/ kPa	最大峰值时刻均值/ ms	距炮口/ m	最大超压峰值均值/ kPa	最大峰值时刻均值/ ms	距炮口/ m	最大超压峰值均值/ kPa	最大峰值时刻均值/ ms	距炮口/ m	最大超压峰值均值/ kPa	最大峰值时刻均值/ ms
1	14/0	2.17	195.6	3.77				2.40	204.9	4.12	2.36	172.7	3.95
2	30/0	4.09	77.7	8.92				3.86	62.1	7.7
3	51/0				6.74	43.6	15.72				5.56	74.2	12.77
4	65/0				8.20	35.5	20.33				6.99	56	16.83
5	65/-23.4	8.23	40.05	20.37				7.6	26.7	19.16
6	14/-25	3.01	108.8	4.89				2.13	210.6	3.48
7	0/-25	2.46	125.8	3.5	1.88	304.4	2.79	2.01	130.3	2.87	2.61	107.7	4.28

测点	0°/ -25°射角工况			14°/0°射角工况
	最大超压峰值/kPa		最大超压峰值误差/%	最大超压峰值/kPa		最大超压峰值误差/%
	试验值	仿真值	最大超压峰值误差/%	试验值	仿真值	最大超压峰值误差/%
1	132.41	134.22	1.37	203.73	226.08	10.97
2	305.83	294.91	3.57
3	132.40	132.18	0.17	213.85	220.32	3.03
4	105.47	107.91	2.31	164.47	184.99	12.48