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您的检索式：作者名="Baowei Fan"
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| 1 | Optimal configuration of bistatic sonar system using Cramér-Rao lower bound of position estimation显示文摘In order to study the optimization configuration problem of bistatic sonar system,the optimal configuration model of bistatic sonar system was established.The positioning accuracy of the dual-base sonar at different dual-base angles was obtained by calculating the Cramér-Rao lower bound(CRLB)accuracy based on the optimal configuration model.The effect of system time measurement error and angle measurement error on positioning accuracy was analyzed by simulation.The transmitting and receiving sonar are deployed on the same circle centered on the target in the simulation.The results showed that the positioning accuracy was the highest at the bistatic angle of 2π/3.This research had certain reference for the optimal configuration of bistatic/multistatic sonar system. | LI Baowei LI Chunxia ZHANG De FAN Mao jun HE Yonggang | 2022 | Chinese Journal of Acoustics2022，41，1： | 1 |
| 2 | Experimental Investigation on the Effect of Blending Ethanol on Combustion Characteristic and Idle Performance in a Gasoline Rotary Engine显示文摘Rotary engine is an ideal electric vehicle range extender.However,the combustion chamber of rotary engine is very narrow and long at the top dead center,which is detrimental to fuel combustion performance.In order to improve its economic and emission performance,this paper built an ethanol/gasoline dual-fuel rotary engine test bench,and the combustion and emission performance of gasoline rotary engine under five ethanol blending ratios were studied.The experimental results showed that,when the fuel pulse width is not adjusted,since the calorific value of ethanol is lower than that of gasoline and the latent heat of vaporization of ethanol is higher than that of gasoline,the addition of ethanol in gasoline lowers the peak pressure.When the ethanol blending ratio reaches 30 vol%,the pressure curve shows a distinct double peak.Under the theoretical air-fuel ratio condition,mixing ethanol in gasoline increases the heat release rate,shortens the combustion duration while prolonging delay period.After blending ethanol,HC,CO and NO_(x)emissions have been reduced under various operating conditions.Excessive ethanol blending ratio increases NO_(x)emissions and increases cycle variation coefficient.When the ethanol blending ratio is 15 vol%,it has better power ability while maintaining low cycle variation coefficient and emissions. | PAN Jianfeng CHENG Biao TAO Jiayu FAN Baowei LIU Yangxian OTCHERE Peter | 2021 | Journal of Thermal Science2021，30，4： | 0 |
| 3 | Optimization of Combustion Characteristics and Fuel Injection Timing of a New Type Dual-Pit Combustor Rotary Engine显示文摘In order to improve the performance of the rotary engine,this paper has designed a new type of dual-pit rotary engine combustion chamber structure,and compares the combustion and emission characteristics with the rotary engine with a traditional combustion chamber.The existence of the dual-pit combustion chamber strengthens the overall vortex intensity in the cylinder,effectively promotes the mixing process of fuel and air in the cylinder,the maximum combustion pressure in the cylinder increased by 8.6%,significantly increases the diffusion combustion speed,and significantly improves the dynamic performance of the rotary engine.On this basis,the effects of fuel injection timing parameters on fuel distribution,combustion and emission characteristics were studied.Fuel distribution is more even and dispersed during injection in the later stage of compression.When the fuel injection timing was 105°BTDC in the middle of the compression phase,the matching effect of fuel distribution law and ignition scheme was the best.When the injection timing was 75°BTDC and 85°BTDC in the late compression stage,the mass fraction of NOx remained at a low level.The correlation between soot generation and the change of fuel injection timing was weak.When the injection time was 85°BTDC,the soot generation remained at a relatively high level. | Zhongjia Li Jianfeng Pan Hongjun Liu Baowei Fan Wenming Yang Abiodun Oluwaleke Ojo | 2021 | Energy Engineering2021，118，3： | 0 |
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