对流冷却对具有功能分级条带的摩擦系统中温度的影响
Aleksander Yevtushenko1, Michał Kuciej1, Katarzyna Topczewska1
1Faculty of Mechanical Engineering, Bialystok University of Technology (BUT), 45C Wiejska Street, 15-351 Bialystok, Poland.
Materials (Basel, Switzerland)
|August 12, 2023
概括
这项研究提出了一种用于在功能梯度材料 (FGM) 条带中进行热传导的精确解决方案,该条带经历摩擦和冷却. 该模型准确预测温度场,有助于摩擦加热元件的热管理.
科学领域:
- 热传递热量转移的方法
- 材料科学 材料科学 材料科学
- 固体力学 固体力学是什么
背景情况:
- 热传导分析对于tribological系统至关重要.
- 现有的解决方案往往假设均的材料,限制了适用性.
- 功能梯度材料 (FGMs) 提供量身定制的热性能,但需要先进的建模.
研究的目的:
- 开发一个精确的分析解决方案,用于带/半空间系统的热传导与摩擦和对流冷却.
- 在这些条件下,研究两部分FGM条带的热行为.
- 分析摩擦和冷却参数对温度分布的影响.
主要方法:
- 热传导的边界值问题的精确分析解决方案.
- 杜哈梅尔定理应用于时间变化的摩擦力.
- 使用FGM (ZrO2-Ti-6Al-4V) 条带和铁半空间无维参数进行数值分析.
- 研究Biot数对温度场的影响.
主要成果:
- 精确的解决方案是导热与摩擦和对流冷却在FGM带.
- 对于小和大里埃数,获得了对称解.
- 该模型成功地预测了ZrO2-Ti-6Al-4V FGM带对铁的温度场.
- 随流冷却显著影响温度分布,这是生物数分析所表明的.
结论:
- 开发的数学模型提供了一种准确和有效的方法,用于估计与对流冷却的摩擦加热系统的最大温度.
- 这项研究推进了涉及像FGM这样的先进材料的部落系统的热分析.
- 这些发现对于设计和优化受摩擦加热和冷却影响的元件非常有价值.
相关概念视频
Mechanisms of Heat Transfer II
3.3K
In convection, thermal energy is carried by the large-scale flow of matter. Ocean currents and large-scale atmospheric circulation, which result from the buoyancy of warm air and water, transfer hot air from the tropics toward the poles and cold air from the poles toward the tropics. The Earth’s rotation interacts with those flows, causing the observed eastward flow of air in the temperate zones. Convection dominates heat transfer by air, and the amount of available space for the airflow...
3.3K
Mechanisms of Heat Transfer I
4.3K
Just as interesting as the effects of heat transfer on a system are the methods by which the heat transfer occur. Whenever there is a temperature difference, heat transfer occurs. It may occur rapidly, such as through a cooking pan, or slowly, such as through the walls of a picnic ice box. So many processes involve heat transfer that it is hard to imagine a situation where no heat transfer occurs. Yet, every heat transfer takes place by only three methods: conduction, convection, and radiation.
4.3K
Mechanisms of Heat Transfer
365
Heat transfer between the human body and its environment occurs through four main mechanisms: conduction, convection, radiation, and evaporation.
Conduction, accounting for approximately 3% of body heat loss at rest, is the process of exchanging heat between molecules of two materials in direct contact. This can result in both heat loss and gain. For instance, when the body is submerged in water, which conducts heat 20 times more effectively than air, it can either lose or gain significant...
Conduction, accounting for approximately 3% of body heat loss at rest, is the process of exchanging heat between molecules of two materials in direct contact. This can result in both heat loss and gain. For instance, when the body is submerged in water, which conducts heat 20 times more effectively than air, it can either lose or gain significant...
365
Mechanism of heat transfer
1.2K
Understanding heat transfer mechanisms is essential for understanding how our bodies maintain balance in different environmental conditions. When the environment is thermoneutral, the body is in a state of balance, neither using nor releasing energy to maintain its core temperature. However, when the environment is not thermoneutral, the body employs four heat transfer mechanisms to maintain homeostasis: conduction, convection, evaporation, and radiation. These mechanisms facilitate heat...
1.2K
Heating and Cooling Curves
22.9K
When a substance—isolated from its environment—is subjected to heat changes, corresponding changes in temperature and phase of the substance is observed; this is graphically represented by heating and cooling curves.
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance, q, and its...
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance, q, and its...
22.9K
Thermal expansion and Thermal stress: Problem Solving
1.2K
San Francisco's Golden Gate Bridge is exposed to temperatures ranging from -15 °C to 40 °C. At its coldest, the main span of the bridge is 1275 m long. Assuming that the bridge is made entirely of steel, what is the change in its length between these temperatures?
To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in...
To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in...
1.2K


