This paper gives the composition of hot runner system and the comparison with the cold runner systems , the differences of hot runner injection moulds between domestic and abroad , and the development tendency of hot runner systems 摘要介绍了热流道系统的组成和与冷流道的比较,国内外热流道注塑模具的差距及热流道系统的发展方向。
This paper described a cold gas simulation of solid rocket motor with submerged nozzle . a two - dimension model with rectangular channel was designed , which can simulate different flow conditions at three periods after ignition 本文从冷流模拟的角度出发,设计了通道为矩形的含潜入喷管发动机冷流模型,可以模拟发动机工作过程中三个不同时刻的流动状态。
On the basis of cold gas simulation , a numerical simulation of two - phase turbulent flow was performed employing an eulerian - eulerian approach and k - - a . p . turbulent model . the accuracy of numerical simulation was verified and evaluated by the experimental result 在冷流模拟的基础上,对燃烧室尾部的两相湍流流场进行了数值模拟,数值模拟采用双流体模型和k - - a . p .湍流模型。
Results of atomization performance in cold - flow - simulated experiment and burning experiment and temperature distribution are reached , influence of nozzle stucture and working condition with atomization performance and conbustion performance are analyzed 确定了这些喷嘴在冷流模拟条件和常压燃烧条件下的流量特性、雾化特性以及喷雾流火焰的温度场特性,比较分析了不同喷嘴结构形式、不同工况对雾化性能和燃烧性能的影响。
The result of investigation on drags of cavities under combustion condition , with different injection schemes and fuel equivalence ratio , indicates that it is smaller than it ’ s of cold flow , and decreases with increasing fuel equivalence ratio , and could be converted into the 研究发现:凹腔火焰稳定器热试阻力小于冷流阻力,并随着当量比的增加而减小,最终会表现为正推力。综合论文研究成果,提出了多凹腔燃烧室设计技术。