基于流固耦合的某速射火炮身管温度场仿真计算

身管液冷技术在陆基防空反导小口径自动炮和舰载中、小口径火炮中被广泛采用，研究身管液冷状态下的温度分布对于火炮发射安全性和武器效能具有重要意义。以某速射火炮为对象，采用热一流一固耦合的研究方法，将传统的温度场计算方法割裂的固体计算区域和流体计算区域祸合在一起，建立了统一的流固传热数学模型。此外，使用计算流体动力学( CFD)计算方法，计算了材料性能与温度相关的身管系统的瞬时温度历程，并讨论了不同速度的冷却水流对身管温度的影响。研究表明：炮身水流外冷却方式对于外壁的冷却效果非常明显，沿径向向内，水流带来的温度降幅逐渐减少；靠近炮管外壁表面的冷却水流薄层温度变化很大；当入口水流超过～定速度时，通过增加流速带来的身管温度场下降很小。

Simulation of Barrel Temperature of a Rapid-Fire Gun Based on Liquid-solid Couple

The barrel liquid-cooling technology is widely used in ground-based air-defense and anti-mis?sile small-caliber automatic gun and ship-borne medium or small caliber guns. It is important to study the temperature distribution of the barrel where liquid-cooling technology is used for gun lunching safe?ty and weapon efnciency. lakmg a certain kind of rapid-fire gun as researched object, a liquid-solid u- nitized mathematic model oi heat transfer was set up by a thermal-liquid-solid coupled method coupling solid region with liquid one separated in traditional calculation method of temperature field. The tran?sient temperature oi the barrel system, whose material properties is related to temperature, was calcu?lated by CFD method, meanwhile the velocity effects of cooling water on barrel temperature were also discussed. The study result shows that the water flow cooling method for the barrel has obviously fa?vorable effect on the outer-surface cooling, along the radial direction inward, the amplitude of temper?ature decreasing caused by water flow fades out gradually; the temperature of the thin cooling-water sheet near the barrel’s outer surface changes a lot; when the flow velocity near the entrance exceeds some value, the barrel temperature field decreases just a little by increasing the flow velocity.