Abstract
Achieving an optimal cooling of the generator unit is indispensable for high working performance. In this work, computational fluid dynamics analysis on the flow field of the conventional type and silent type of the S688CCS series generator unit is conducted, and design optimization of the generator unit with poor cooling is studied based on flow field analysis results. Flow field simulation results indicate that the total cooling air quantity of the silent type generator unit is lower than that of the conventional type generator unit, and the cooling air quantity of the radiator is also lower than that of the conventional type generator unit, which is not conductive for the cooling of the silent type generator unit. The flow field optimization is achieved by adopting the single variable control method to improve the structure of the fan cover, silent components for silence, adjacent structure, and air inlet grille. The corresponding structure optimization scheme is put forward. After optimization, the air quantity for the cooling radiator of the silent type generator unit is 44.33% higher than that of its original structure, and the total cooling air quantity is higher than that of the conventional type generator unit. The research results in this work can provide a theoretical basis for the design of the cooling air flow path of generator units for achieving an optimal cooling performance.
Highlights
With the development of science and technology, China’s economy and people’s living are improved
Erefore, generator units are facing the strategic transformation of rapid demand and expansion. e main components of the general generator unit include engine, magneto, muffler, air filter, starter, radiator, cover parts, framework, and decorative parts, among which the cooling fan and radiator are used for the cooling of the generator unit [1]. e generator unit is usually divided into the conventional type model and silent type model. e most important design challenge of the silent generator unit is how to reasonably design the silencing components of the generator unit under the condition of satisfying aerodynamic acoustics and cooling performance of the generator unit, so as to ensure the feasible operation of the generator unit
The air ducts’ size and positions are different from the conventional type generator unit; this maybe another reason for the reduction of total cooling air quantity for the silent type generator unit. erefore, based on the flow field analysis results, the design optimization of the silent type generator unit should be conducted for improving its cooling performance. e position of soundabsorbing materials and the rearrangement of cooling air ducts maybe two main optimization directions according to computational fluid dynamics (CFD) analysis results
Summary
With the development of science and technology, China’s economy and people’s living are improved. Erefore, the numerical simulation on flow field characteristic and design optimization of generator units is conducted based on computational fluid dynamics (CFD) analysis. E main purpose of this study is to establish a reliable CFD model for obtaining flow field characteristics of the conventional type and silent type of S688CCS series generator unit, verify the effectiveness of the CFD model by air velocity measurement, and conduct design optimization research of the generator unit with poor cooling performance. Rough a thorough investigation of fluid flow analysis and cooling structure optimization, it can form a theoretical reference for the cooling structure design of the generator unit and give the simulation data support for the designers to make a proper evaluation on cooling performance of the generator unit The relative literature about the flow field analysis and cooling performance optimization study on the generator unit used for emergency power supply is rarely. rough CFD modeling and optimization, an optimal cooling design of the generator unit can be quickly obtained. erefore, the numerical simulation on flow field characteristic and design optimization of generator units is conducted based on computational fluid dynamics (CFD) analysis. e main purpose of this study is to establish a reliable CFD model for obtaining flow field characteristics of the conventional type and silent type of S688CCS series generator unit, verify the effectiveness of the CFD model by air velocity measurement, and conduct design optimization research of the generator unit with poor cooling performance. rough a thorough investigation of fluid flow analysis and cooling structure optimization, it can form a theoretical reference for the cooling structure design of the generator unit and give the simulation data support for the designers to make a proper evaluation on cooling performance of the generator unit
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