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Impact of Initial Storm Intensity and Size on the Simulation of Tropical Cyclone Track and Western Pacific Subtropical High Extent
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作者 Yuxing WANG Yuan SUN +3 位作者 Qianfeng LIAO Zhong ZHONG Yijia HU Kefeng LIU 《气象学报:英文版》 SCIE CSCD 2017年第5期946-954,共9页
Typhoon Megi, the 13 th typhoon of the 2010 typhoon season, was selected for case study by utilizing the Weather Research and Forecasting(WRF) model. Twelve sensitivity experiments with various initial tropical cyclon... Typhoon Megi, the 13 th typhoon of the 2010 typhoon season, was selected for case study by utilizing the Weather Research and Forecasting(WRF) model. Twelve sensitivity experiments with various initial tropical cyclone(TC) intensities and sizes were conducted to investigate their impacts on the simulation of typhoon track. Interaction between TC and the western Pacific subtropical high(WPSH) was also analyzed to explore the mechanism for the impact on TC track of the initial TC intensity and size. Numerical results indicate that the simulated TC size and TC track are sensitive to initial TC intensity and size. Stronger initial TC intensity and larger initial TC size often lead to larger simulated TC size and make TC turn northward earlier. Further analysis suggests that, with the increase of initial TC intensity and size, more air mass enters into the TC region, which subsequently reduces the extent of WPSH.As a result, the steering flow changes significantly and eventually causes the TC to turn northward earlier. The present study confirms that the initial TC intensity and size have certain influences on the TC track simulation, which demonstrates the importance of accurate initial condition for successful simulation of the TC intensity and TC track.Moreover, it also deepens our understanding of the interaction between TC and WPSH, provides helpful clues for the TC track change study, and discusses the future directions for improvement of TC track forecast. 展开更多
汽油发动机瞬态工况燃烧规律的试验研究 预览 被引量:3
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作者 马玺 刘义佳 +3 位作者 袁军亮 胡晓 关松 鲍春来 《小型内燃机与车辆技术》 2015年第5期17-20,43共5页
对于车用发动机而言,其运行工况具有稳态与瞬态之分,且变化规律大不相同。一般而言,瞬态工况分为转速和扭矩均随时间变化、定转速变扭矩工况、定扭矩变转速工况、起动工况、停机工况,其中定转速变扭矩与定扭矩变转速工况具有一定的代表... 对于车用发动机而言,其运行工况具有稳态与瞬态之分,且变化规律大不相同。一般而言,瞬态工况分为转速和扭矩均随时间变化、定转速变扭矩工况、定扭矩变转速工况、起动工况、停机工况,其中定转速变扭矩与定扭矩变转速工况具有一定的代表性。通过试验研究分析汽油发动机在定转速变扭矩工况下各燃烧参数的变化情况,从而进一步揭示其燃烧规律,为优化发动机的瞬态性能提供理论依据。 展开更多
关键词 汽油机 瞬态工况 燃烧 性能
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