摘要
为了解决6MF-30型风力灭火机效率偏低等问题,该文首先对该风力灭火机的实际工况进行测试并模拟计算;然后应用最优化理论,建立该风力灭火机效率和声功率级的多目标优化数学模型,编程计算得到设计变量的最优组合及计算结果,以优化后的结构参数为基础建立三维模型,模拟计算结果显示,优化风机的A计权声压级虽然较原机增加1.28%,但效率、出口全压、出口流量和出口速度分别较原机提高17.56%、23.96%、11.56%和11.33%,风机的综合性能得到改善。该结论可为风力灭火机的设计提供参考。
In order to solve the problems of low efficiency and excessive noise of 6MF-30 pneumatic extinguisher, the experiment and simulation were carried out under the working condition. The efficiency and SPL of the extinguisher were taken as objective parameters for optimal design and optimal variables and results were obtained by C＋＋ programming. Taking the complex three-dimensional flow in the extinguisher into account, a three-dimensional model was built based on the multi-objective optimal structural parameters. The simulated results showed that the sound power level of the optimized extinguisher increased by 1.96% compared to original machine. However, the efficiency, outlet total pressure, outlet flow and outlet velocity increased by 17.56%, 23.96%, 11.56% and 11.33%, respectively. The combination property of the extinguisher is improved after optimization. The research can provide a reference for design of pneumatic extinguisher.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2012年第22期39-44,共6页
Transactions of the Chinese Society of Agricultural Engineering
基金
国家公益性行业(农业)科研专项经费项目(200903041-04)
关键词
数值分析
多目标优化
效率
声功率级
风力灭火机
numerical simulation
multi-objective optimization
efficiency
SPL
pneumatic extinguisher
