兩相流存在于大多數(shù)熱工流體環(huán)境中,在核電站燃料組件間熱力水力工程實驗中的氣液兩相流測量有重要意義。網(wǎng)絲傳感器在采集分辨率和采集速度上比電阻式,超聲波式傳感器更有優(yōu)勢。壓水堆燃料組件熱工水力實驗中的氣液兩相流的測量有對于研究特定工況下棒間流動特性、包殼傳熱特性均有重要意義。傳統(tǒng)的兩相流測量手段應(yīng)用于燃料組件棒間空泡份額和氣泡速度分布測量時,存在測量空間分辨率不夠,或測量成本過高的局限性。針對上述問題,論文開展了適合燃料組件兩相流測量的網(wǎng)絲傳感器的研制,包括激勵電路和接收電路設(shè)計、數(shù)據(jù)采集程序和圖像重構(gòu)程序、燃料組件模擬實驗段設(shè)計等。與傳統(tǒng)的網(wǎng)絲傳感器不同的是,該設(shè)計同時將燃料棒本體作為激勵電極,進一步提高了測量的空間分辨率。為了測試和驗證所設(shè)計的網(wǎng)絲傳感器,設(shè)計并制造了模擬燃料組件實驗臺架。通過安裝了棒束的矩形實驗段中產(chǎn)生上升氣泡,模擬燃料組件間的兩相流環(huán)境。在本課題中,電路設(shè)計是最重要的部分。電路設(shè)計得到改進。設(shè)計的電路在功率、成本和復(fù)雜度方面進行了優(yōu)化。該控制是使用微控制器執(zhí)行的,沒有使用任何移位寄存器或多路復(fù)用器。電路簡單,響應(yīng)時間快,噪聲低。 

【文章頁數(shù)】：93 頁

【學(xué)位級別】：碩士

【文章目錄】：
摘要
Abstract
Introduction
    1.1 Nuclear science and nuclear energy
    1.2 Commonly used Nuclear Reactors
        1.2.1 Pressurized Boiling Water Nuclear Reactors(PWRs)
        1.2.2 Boiling water Reactor
        1.2.3 Pressurized Heavy Water Reactor
    1.3 Void fraction & two-phase flow
        1.3.1 Phase fraction
    1.4 Types of two-phase flow
    1.5 Wire-Mesh Sensor
    1.6 Other void fraction measurement techniques
        1.6.1 Tomographic multiphase flow imaging
    1.7 Significance and motivation of research
    1.8 Research objectives
Test Facility Design
    1.9 Acrylic pipe designing
    1.10 Test facility base
    1.11 Acrylic pipe parts
    1.12 Air injection design
    1.13 Test facility
Wire-Mesh Sensor Design
    1.14 Performance requirements
    1.15 Wire mesh sensor working flow
    1.16 Excitation circuit
        1.16.1 STM32F103RC micro-controller
        1.16.2 Voltage follower AD8651AR
    1.17 Receiver Circuit
        1.17.1 AD8007 Trans-impedance Amplifier
    1.18 Measurement principal of WMS circuit
Programming and PCB Design
    1.19 Micro-Controller Programming
        1.19.1 Configuration of GPIOs
        1.19.2 Configuration of Timer
    1.20 PCB Designing
        1.20.1 Voltage follower circuit
        1.20.2 Transmitter circuit
        1.20.3 Receiver circuit
Testing
    1.21 Connection of test facility with control system
    1.22 Testing
        1.22.1 Micro-controller program testing
        1.22.2 Transmitter PCB testing
        1.22.3 Receiver PCB testing
        1.22.4 Air injection system testing
        1.22.5 Overall system testing
    1.23 Calibration method
Data acquisition and results
    1.24 Data acquisition selection system
    1.25 Lab view-graphical programming syntax
    1.26 Results
        1.26.1 Signal sequence for transmitters
        1.26.2 Four transmitter signals connected
        1.26.3 Thirteen transmitter signals connected
Conclusion and Future Works
    1.27 Conclusion
    1.28 Future works
References
Appendix
    1. STM32F103RC code for signal generation
Publications
Acknowledgements



本文編號：3706499