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基于数值模拟的海浪水轮机变角度导流装置参数优选 被引量:1
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作者 王俊皓 李国富 +2 位作者 郑烨堃 施韬晦 徐晓倩 《水电能源科学》 北大核心 2015年第8期136-139,57,共5页
为保护叶轮在高海浪流速情况下不超载工作,提出一种新型变角度导流罩装置,即在流速较小时流体在导流罩内加速,提高波能利用率降低叶轮启动速度;随着流速增加,变角度导流口收缩,有效减少受冲击叶轮面积保护叶轮。并采用RNG湍流模型对变... 为保护叶轮在高海浪流速情况下不超载工作,提出一种新型变角度导流罩装置,即在流速较小时流体在导流罩内加速,提高波能利用率降低叶轮启动速度;随着流速增加,变角度导流口收缩,有效减少受冲击叶轮面积保护叶轮。并采用RNG湍流模型对变角度装置长短轴比值、导流罩形状、角度三个参数进行数值分析和性能选择。结果表明,在高流速情况下加装变角度导流罩对叶轮保护作用明显,选取长短轴比值3∶1、采用Y型导流罩、初始角度值45°时波能利用率最高;模拟结果与试验结果吻合较好,验证了模拟结果的可靠性。 展开更多
关键词 海浪水轮机 变角度 导流罩 波浪能 功率系数
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Comparative Study of Turbines for Wave Energy Conversion
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作者 HideakiMaeda ToshiakiSetoguchi 《Journal of Thermal Science》 SCIE EI CAS CSCD 2001年第1期26-31,共6页
The objective of this paper is to compare the performances of the themes, which could be used for wave energy conversion in the near future, under various irregular wave conditions. The turbines included in the paper ... The objective of this paper is to compare the performances of the themes, which could be used for wave energy conversion in the near future, under various irregular wave conditions. The turbines included in the paper are as follows: (a) Wells turbine with guide vanes; (b) impulse turbine with self-pitch-controlled guide vanes; (c) impulse turbine with fixed guide vanes. In this study, experimental investigations were carried out to clarify the performances of the turbines under steady flow conditions, and then a numerical simulation was used for predicting the performances under irregular wave conditions with various significant wave heights. As a result it was found that the running and starting characteristics of the impulse turbines could be superior to those of the Wells turbine. 展开更多
关键词 fluid machinery Wells turbine impulse turbine wave power conversion ocean energy.
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