Plotnikov Leonid, Plotnikov Iurii, Osipov Leonid, Slednev Vladimir, Shurupov Vladislav
Department of Turbines and Engines, Ural Federal University Named after the First President of Russia B.N. Yeltsin, Str. Mira, 19, 620002 Yekaterinburg, Russia.
Department of Electric Drives and Industrial Installations Automation, Ural Federal University Named after the First President of Russia B.N. Yeltsin, Str. Mira, 19, 620002 Yekaterinburg, Russia.
Sensors (Basel). 2022 Aug 25;22(17):6395. doi: 10.3390/s22176395.
An indirect method and procedure for determining the local heat transfer coefficient in experimental studies on the intensity of heat transfer at a gas-surface interface is described. The article provides an overview of modern approaches and technical devices for determining the heat flux or friction stresses on surfaces in the study of thermophysical processes. The proposed method uses a constant-temperature hot-wire anemometer and a sensor with a thread sensitive element fixed on the surface of a fluoroplastic substrate. A substrate with the sensor's sensitive element was mounted flush with the wall of the investigated pipeline. This method is based on the Kutateladze-Leontiev approach (the laws of friction and heat transfer) and the hydrodynamic analogy of heat transfer (the Reynolds analogy): this is an assumption about the unity of momentum and heat transfer in a turbulent flow, which establishes a quantitative relationship between friction stresses on the heat exchange surface and heat transfer through this surface. The article presents a method for determining the speed of the developed measuring system. An example of a successful application of the proposed method in relation to the study of thermomechanical processes in the gas exchange systems of reciprocating internal combustion engines is described.
描述了一种在气-表面界面传热强度实验研究中确定局部传热系数的间接方法和程序。本文概述了在热物理过程研究中确定表面热通量或摩擦应力的现代方法和技术装置。所提出的方法使用恒温热线风速仪和带有固定在氟塑料基板表面的丝状敏感元件的传感器。带有传感器敏感元件的基板与被研究管道的壁齐平安装。该方法基于库塔捷拉泽-列昂季耶夫方法（摩擦和传热定律）以及传热的流体动力学类比（雷诺类比）：这是关于湍流中动量和传热统一性的假设，它建立了热交换表面上的摩擦应力与通过该表面的传热之间的定量关系。本文介绍了一种确定所开发测量系统速度的方法。描述了所提出的方法在往复式内燃机气体交换系统热机械过程研究中的成功应用实例。
