隨著社會(huì)經(jīng)濟(jì)發(fā)展與環(huán)保的需要,人們對(duì)風(fēng)能、潮汐能、海流能等可再生資源的關(guān)注日益提高。近年來(lái),由于可再生能源領(lǐng)域的飛速發(fā)展,基于流致振動(dòng)的發(fā)電設(shè)備不斷涌現(xiàn),學(xué)術(shù)界又掀起了新一輪的關(guān)于流致振動(dòng)及其能量提取的研究浪潮。然而,目前基于流致振動(dòng)的發(fā)電設(shè)備通常是提取鈍體渦激振動(dòng)所轉(zhuǎn)化的能量,僅適用于較低流速范圍�？紤]到不同直徑串列圓柱所引起的具有較高能量的馳振現(xiàn)象,有望基于此現(xiàn)象開(kāi)發(fā)出新型的俘能裝置并提高能量轉(zhuǎn)化效率。本課題提出了基于不同直徑串列圓柱的流致振動(dòng)發(fā)電裝置。該裝置利用位于直徑為d的圓柱尾流中的彈性支撐圓柱體（直徑為D）的流致振動(dòng)現(xiàn)象來(lái)進(jìn)行能量的采集。圓柱的直徑比為d/D=0.4。實(shí)驗(yàn)中均勻來(lái)流的流速U_∞范圍為1.54 m/s～9.0 m/s,對(duì)應(yīng)的雷諾數(shù)范圍為Re=3.3×10～3～1.95×10～4。振動(dòng)系統(tǒng)的質(zhì)量比m*為802,而振動(dòng)系統(tǒng)的阻尼比ξ為控制參量其變動(dòng)范圍在0.00091到0.00340之間。圓柱之間的中心距與上游圓柱直徑的比值為L(zhǎng)/d=1.0、1.5、2.0、2.5、3.0、3.5和4.0。依據(jù)下游圓柱體的振動(dòng)幅值和頻率,對(duì)能量采集系統(tǒng)的功率P及其...

【文章頁(yè)數(shù)】：81 頁(yè)

【學(xué)位級(jí)別】：碩士

【文章目錄】：
摘要
Abstract
Acknowledgement
Nomenclature
Chapter1 INTRODUCTION
    1.1 Background
    1.2 Literature review
        1.2.1 Single-cylinder and the energy extraction
        1.2.2 Multiple circular cylinders
        1.2.3 Energy extraction of multiple circular cylinders
    1.3 Objective
Chapter2 EXPERIMENTAL SETUP
    2.1 Wind tunnel
    2.2 Vibration system setup detail
    2.3 Measurement of vibration response
    2.4 Measurement of pressure and force
    2.5 Measurement of flow speed
    2.6 PIV measurement
    2.7 Mathematical description
    2.8 Summary
Chapter3 Energy extraction from FIV
    3.1 Pressure and force response
    3.2 Vibration responses
    3.3 Frequency responses
    3.4 Power harness
    3.5 Efficiency of harnessed power
    3.6 Summary
Chapter4 Water tunnel documentation
    4.1 Water tunnel design
    4.2 Flow speed of the water tunnel
    4.3 The flow speed distribution
    4.4 The vibration of the tunnel wall
    4.5 The turbulence intensity
    4.6 Summary
CONCLUSIONS
REFERENCES
Author’s Publications
詳細(xì)中文摘要



本文編號(hào)：4041476