摘要旋风分离器是一种利用气固两相流的旋转运动使气流中的尘粒在离心力的作用下被分离出去的设备。其具有结构简单，设备紧凑，操作方便等优点，可满足不同特殊要求，应用广泛。

欧姆龙公司针对传统的MEMS流量传感器对气流中的尘粒比较敏感这个缺点，设计了装有旋风分离器结构的双向除尘系统的新型D6F-P MEMS流量传感器，但其除尘系统的结构和尺寸参数均有优化提升的空间。61601

本文利用CFD商业软件FLUENT6.3.26对D6F-P流量传感器的除尘系统进行了结构设计，建模和数值模拟。在选择了合适的模拟方案后，研究了不同因素对该除尘系统性能的影响，并对该除尘系统进行了优化。

通过本文的大量模拟研究，可以发现影响该除尘系统性能的主要因素是d1,d2,h这三个系统结构参数以及尘粒的粒径和密度等固相物理性质参数。根据本文所得出的研究结论，结合正交试验分析法和MATLAB软件，分别得到了优化模型一和优化模型二，并验证了优化模型的优越性。

毕业论文关键词  旋风分离器  数值模拟  正交试验  气固两相流  除尘效率

毕业设计说明书（论文）外文摘要

Title    Analysis of Dust Segregation System of MEMS Mass Flow Sensor Based on Cyclone Flow Theory                        

Abstract Cyclone separator is a device that removes particulates from liquid stream through vortex separation. Its primary advantages are simplicity and compaction in construction and convenience in operation, which enable its adaptability to a wide range of operating conditions.

Conventional MEMS flow sensors are particularly sensitive to dust particles. To overcome this drawback, OMRON designed D6F-P MEMS flow sensor, which has a built-in bidirectional Dust Separation System(DDS) with cyclone flow structure. However, it is still possible to optimize the structure and parameter of the DDS to improve its performance.

The DDS of DF6-P sensor has been designed, modeled, and computationally investigated by using FLUENT6.3.26. The effect of different parameters on separator’s performance has been studied and the DDS has been optimized after choosing the suitable program of numerical simulation. 

The conclusion that structure parameters d1,d2,h and physical property of particles like its diameter and density are the main factors that affect separator’s performance can be drawn by computational simulation. Based on these conclusions, optimized model1 and optimized model2 can be obtained with using orthogonal test analysis method and MATLAB. The optimized models are proved to be superior in the article.

Keywords  cyclone separator, computational simulation, orthogonal test, gas-solid phase, collection efficiency

1 引言 1

1.1 研究背景与意义 1

1.2 除尘器的研究现状 1

1.3 旋风分离器理论研究的进展 4

1.4 D6F-P MEMS质量流量传感器的旋风除尘系统现状 4

1.5 课题研究目的和主要工作 5

1.6 课题研究方法 5

2 旋风分离器的设计 6

2.1 旋风分离器结构的确定 6

2.2 旋风分离器外形尺寸的确定 7

3 旋风分离器的性能分析 8

3.1 旋风分离器的性能评价指标 8

3.2 影响旋风分离器性能的因素