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按循环供油量进一步强化现代高速发动机的前途取决于燃烧室壁向冷却介质散热的效果。因此,进一步研究该过程的特性与影响因素的相互关系是很迫切的,这将有助于制定气缸——活塞组零件内温度场和热流最佳化的措施。我们的研究目的是用试验方法确定流体动力学和热物理学因素对高速柴油机由燃烧室壁向冷却介质的对流散热系数(一个循环内局部的平均值)的影响。试验验证下面提出的向冷却介质对流散热的物理模型也是一项重要课题,以这个模型作基础还可以对其它发动机所研究的过程进行理论上的概括。在高速柴油机内,向冷却介质的散热可以在单相和两相的条件下进行。对单相散热模型的研究已相当详尽。从对它的研究中可以得出结论,在这里主要影响因
According to the cycle of fuel supply to further enhance the future of modern high-speed engine depends on the combustion chamber wall to the cooling medium cooling effect. Therefore, further study of the interrelationship between the characteristics and influencing factors of the process is very urgent, which will help to develop measures to optimize the temperature field and heat flow in the cylinder-piston assembly. Our research purpose is to use experimental methods to determine the influence of hydrodynamic and thermophysical factors on the convective heat dissipation coefficient (local averaging over one cycle) of a high-speed diesel engine from the combustion chamber wall to the cooling medium. It is also an important subject to verify the physical model proposed below for convective cooling of cooling medium. Based on this model, theoretical studies of the processes studied by other engines can also be summarized. In high-speed diesel engines, the cooling of the cooling medium can be carried out under single-phase and two-phase conditions. The research on the single-phase heat dissipation model is quite exhaustive. From the research on it, it can be concluded that the main influence here