相关实验视频
Updated: Jul 13, 2026
08:29
Thermal Measurement Techniques in Analytical Microfluidic Devices
Published on: June 3, 2015
9.6K
航空发动机冷却孔测量的进步:全面审查
Shuyan Yan1,2,3, Junkai Shi1, Guannan Li1
1Institute of Microelectronics of the Chinese Academy of Sciences, Beijing 100029, China.
Sensors (Basel, Switzerland)
|April 13, 2024
概括
薄膜冷却技术可以提高飞机发动机的性能. 本研究回顾了冷却孔测量方法,详细介绍了传统的局限性和五种数字技术,以提高精度.
科学领域:
- 航空航天工程 航空航天工程
- 机械工程 机械工程
- 材料科学 材料科学 材料科学
背景情况:
- 薄膜冷却对于航空发动机的性能和寿命至关重要.
- 对薄膜冷却效率的日益增长的需求推动了冷却孔测量的进步.
- 精确测量冷却孔对于优化薄膜冷却至关重要.
研究的目的:
- 审查薄膜冷却技术的原理和演变.
- 分析冷却孔的传统和数字测量方法.
- 确定冷却孔计量学的挑战和未来趋势.
主要方法:
- 对薄膜冷却原理和冷却孔演变的审查.
- 分析传统的冷却孔测量技术及其局限性.
- 五种数字测量方法的分类和分析:探测,光学,红外成像,CT扫描和复合.
主要成果:
- 传统的冷却孔测量方法具有固有的局限性.
- 数字测量技术提供了更高的精度和效率.
- 集成自动化测量平台正在出现,用于先进的应用.
结论:
- 数字测量方法对于推进薄膜冷却技术至关重要.
- 解决冷却孔计量技术方面的技术挑战是未来研究的关键.
- 本综述为未来航空发动机冷却孔测量研究提供了指导.
更多相关视频
10:03Uncoupling Coriolis Force and Rotating Buoyancy Effects on Full-Field Heat Transfer Properties of a Rotating Channel
Published on: October 5, 2018
8.2K
10:36Author Spotlight: Optimization of Airflow Velocities in Battery Cooling Systems for Enhanced Thermal Performance and Reduced Energy Consumption
Published on: November 3, 2023
1.5K
相关概念视频
01:14Mechanisms of Heat Transfer I
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.
01:20Mechanisms of Heat Transfer II
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...
01:10Heat Engines
A heat engine is a device used to extract heat from a source and then convert it into mechanical work used for various applications. For example, a steam engine on an old-style train can produce the work needed for driving the train.
Whenever we consider heat engines (and associated devices such as refrigerators and heat pumps), we do not use the standard sign convention for heat and work. For convenience, we assume that the symbols Qh, Qc, and W represent only the amounts of heat transferred...
Whenever we consider heat engines (and associated devices such as refrigerators and heat pumps), we do not use the standard sign convention for heat and work. For convenience, we assume that the symbols Qh, Qc, and W represent only the amounts of heat transferred...
01:14Mechanisms of Heat Transfer
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 heat.
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 heat.
01:16Measurement of Fluid Pressure
Fluid pressure is commonly measured using devices called manometers, which rely on liquid columns to indicate pressure differences. The height of a liquid column in a manometer reflects the pressure exerted by the fluid, providing a simple yet effective means of measurement. Different types of manometers serve specific purposes based on their configurations and the type of fluids involved.
A basic form of manometer is the piezometer, a vertical tube open at the top and filled with the same...
A basic form of manometer is the piezometer, a vertical tube open at the top and filled with the same...
01:23Steady, Laminar Flow in Circular Tubes
Hagen-Poiseuille flow describes a viscous fluid's steady, incompressible flow through a cylindrical tube with a constant radius R. This flow profile is often applied to understand fluid transport in narrow channels, such as capillaries. It serves as a foundational example of laminar flow. In this model, cylindrical coordinates (r,θ,z) are used to describe the radial (r), angular (θ), and axial (z) dimensions within the tube. For Hagen-Poiseuille flow, the velocity profile is purely axial,...