文章摘要
黄俊刚,李长友,文光安.液力缓速器全流道式制动流场数值计算方法研究[J].机床与液压,2016,44(4):78-82
液力缓速器全流道式制动流场数值计算方法研究
Numerical Computation Method of Full runner Braking Flow Field of Hydrodynamic Retarder
  
DOI:10.3969/jissn1001-3881201604024
中文关键词: 液力缓速器  全流道  换热芯子  制动流场  数值计算
英文关键词: Hydrodynamic retarder  Full runner  Heat exchanger core  Braking flow field  Numerical computation
基金项目:广东交通职业技术学院博士科研启动基金(GG81080134);国家自然科学基金资助项目(31371871);液力缓速器关键技术难题研究横向科技项目(KYH18101)
作者单位E-mail
黄俊刚 广东交通职业技术学院 lemongang@yeah.net 
李长友 广东交通职业技术学院  
文光安 广东交通职业技术学院  
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中文摘要:
      现有关于液力缓速器制动流场数值计算方法的研究均忽略了换热芯子的流阻压降作用,导致计算边界条件设置不准确的问题。为此,基于三维扫描还原的模型重建技术,考虑换热芯子的流阻压降作用,采取全流道式选取方案,选用RNG 双方程模型与基于压力的PISO求解算法,运用CFD技术对VOITH公司VR120液力缓速器制动流场进行全流道式数值计算,获得制动力矩与转速特性曲线,并使用流场压力云图对换热芯子的流阻压降作用进行验证分析。结果表明:制动力矩随着转速的升高呈现二次方增长趋势;换热芯子的流阻压降作用显著,是不可忽略的流场边界条件,全流道式数值计算方法是必要的。
英文摘要:
      At present, in the calculation process of the braking flow field of hydraulic retarder, the flow resistance and voltage drop effects of heat exchanger core are ignored, resulting in inaccurate setting of calculation boundary conditions. Therefore, based on model reconstruction technique of three dimensional scanning reduction, by taking the full runner selection scheme, using RNG two equation model and pressure based PISO algorithm, considering the flow resistance and voltage drop effects of heat exchanger core, an overall numerical computation was conducted on the braking flow field of hydrodynamic retarder VR120 from VOITH by using computer fluid dynamics (CFD) technique. The curves of braking torque and speed characteristics were derived, and verification analysis was conducted on flow resistance and voltage drop effects of the heat exchanger core with using of nephogram of flow field pressure.The results show that the braking torque presents a quadratic growth trend as the speed increases; the heat exchanger core has significant flow resistance and voltage drop effects, which is non negligible flow field boundary conditions, and full runner computation method is necessary.
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