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The aerodynamic characteristics of ordinary vehicle have been studied by lots of scholars, while few people pay enough attention to the motorcycle's aerodynamic characteristics. But as the requirements of laws and regulations for motorcycle's performance continues to increase and the motorcycle market develops, doing motorcycle's aerodynamic characteristics analysis is much more necessary now. In...
Selective catalytic reduction (SCR) technique has been used to reduce NOx emission from engines for decades. The concentration and distribution of ammonia before SCR converter can affect the conversion efficiency of NOx in SCR system. In this paper, the injection process of urea aqueous solution has been simulated by the CFD software Fluent to obtain the distribution of ammonia mass fraction in the...
A fluidic flowmeter with new structure is designed in this work on the basis of the traditional ones in order to obtain wide measurement range. This fluidic flowmeter has the diffuser wall with polygonal line and it has the performance of adaptability and stability. The CFD software FLUENT is employed to the numerical simulations of the fluidic flowmeter. The linear-relationship of oscillation frequency...
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