The muzzle blast overpressure induces disturbances in the flow field inside the crew compartment(FFICC)of a truck-mounted howitzer during the artillery firing.This overpressure is the primary factor preventing personn...The muzzle blast overpressure induces disturbances in the flow field inside the crew compartment(FFICC)of a truck-mounted howitzer during the artillery firing.This overpressure is the primary factor preventing personnel from firing artillery within the cab.To investigate the overpressure characteristics of the FFICC,a foreign trade equipment model was used as the research object,and a numerical model was established to analyze the propagation of muzzle blast from the muzzle to the interior of the crew compartment under extreme firing condition.For comparative verification,the muzzle blast experiment included overpressure data from both the flow field outside the crew compartment(FFOCC)and the FFICC,as well as the acceleration data of the crew compartment structure(Str-CC).The research findings demonstrate that the overpressure-time curves of the FFICC exhibit multi-peak characteristics,while the pressure wave shows no significant discontinuity.The enclosed nature of the cab hinders the dissipation of pressure wave energy within the FFICC,leading to sustained high-amplitude overpressure.The frameskin structure helps attenuate the impact of muzzle blast on the FFICC.Conversely,local high overpressure caused by the convex or concave features of the cab's exterior significantly amplifies the overpressure amplitude within the FFICC.展开更多
针对小口径火炮身管长度和后坐力与无人作战平台不匹配、传统膛口装置功能单一等问题,设计集制退、消声、消焰为一体的多功能膛口装置,提出一种适用于该膛口装置的超压分布模型。采用截短型火炮身管,利用Fluent软件建立2维轴对称气体动...针对小口径火炮身管长度和后坐力与无人作战平台不匹配、传统膛口装置功能单一等问题,设计集制退、消声、消焰为一体的多功能膛口装置,提出一种适用于该膛口装置的超压分布模型。采用截短型火炮身管,利用Fluent软件建立2维轴对称气体动力学模型来计算膛口流场;采用大涡模拟模型,使用Ffowcs Williams and Hawkings方法计算噪声变化情况,结果显示,该膛口装置的制退效率为70%,消音率为17.8%,制退效率与实验误差为14%,消音率与实验误差为11%。数值仿真结果表明:该膛口装置能有效降低火炮后坐力,并且在射击时有良好的隐蔽性,满足现代战争的需要。展开更多
基金supported by the National Natural Science Foundation of China(Grant No.U2341269)。
文摘The muzzle blast overpressure induces disturbances in the flow field inside the crew compartment(FFICC)of a truck-mounted howitzer during the artillery firing.This overpressure is the primary factor preventing personnel from firing artillery within the cab.To investigate the overpressure characteristics of the FFICC,a foreign trade equipment model was used as the research object,and a numerical model was established to analyze the propagation of muzzle blast from the muzzle to the interior of the crew compartment under extreme firing condition.For comparative verification,the muzzle blast experiment included overpressure data from both the flow field outside the crew compartment(FFOCC)and the FFICC,as well as the acceleration data of the crew compartment structure(Str-CC).The research findings demonstrate that the overpressure-time curves of the FFICC exhibit multi-peak characteristics,while the pressure wave shows no significant discontinuity.The enclosed nature of the cab hinders the dissipation of pressure wave energy within the FFICC,leading to sustained high-amplitude overpressure.The frameskin structure helps attenuate the impact of muzzle blast on the FFICC.Conversely,local high overpressure caused by the convex or concave features of the cab's exterior significantly amplifies the overpressure amplitude within the FFICC.
文摘针对小口径火炮身管长度和后坐力与无人作战平台不匹配、传统膛口装置功能单一等问题,设计集制退、消声、消焰为一体的多功能膛口装置,提出一种适用于该膛口装置的超压分布模型。采用截短型火炮身管,利用Fluent软件建立2维轴对称气体动力学模型来计算膛口流场;采用大涡模拟模型,使用Ffowcs Williams and Hawkings方法计算噪声变化情况,结果显示,该膛口装置的制退效率为70%,消音率为17.8%,制退效率与实验误差为14%,消音率与实验误差为11%。数值仿真结果表明:该膛口装置能有效降低火炮后坐力,并且在射击时有良好的隐蔽性,满足现代战争的需要。
