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Constant Pressure Calorimetry

Constant Pressure Calorimetry

Calorimetry is a technique used to measure the amount of heat involved in a chemical or physical process or to measure the heat transferred to or from a substance. The heat is exchanged with a calibrated and insulated device called the calorimeter. Calorimetry experiments are based on the assumption that there is no heat exchange between the insulated calorimeter and the external environment. The well-insulated calorimeters prevent the transfer of heat between the calorimeter and its external...

Calorimetry

Calorimetry

When objects at different temperatures are placed in contact with each other but isolated from everything else, they attain thermal equilibrium. A container that prevents heat transfer in or out is called a calorimeter, and the use of a calorimeter to make measurements is called calorimetry. Generally, these measurements involve heat or specific heat capacity. The term "calorimetry problem" is used for any problem where the specified objects are thermally isolated from their...

Temperature Measurement Sites

Temperature Measurement Sites

A thermometer measures body temperature. The common sites for measuring body temperature are the oral cavity, axillary region, temporal artery, and skin surface, such as the forehead, abdomen, and axilla. True core body temperature is assessed in the rectum, tympanic membrane, pulmonary artery, esophagus, and urinary bladder.
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...

Equipments Used to Measure Body Temperature

Equipments Used to Measure Body Temperature

Body temperature can be assessed using various devices and measured in Celsius or Fahrenheit.
Glass-bulb Thermometer:
Glass-bulb thermometers are hollow glass tubes with a bulb tip containing liquid such as ethanol or mercury. Historically, glass bulb mercury thermometers were the standard device to measure body temperature. Today, mercury thermometers are prohibited in many countries due to the hazardous effects of mercury and the risk of exposure if the glass bulb breaks. In general,...

Temperature and Thermal Equilibrium

Temperature and Thermal Equilibrium

Heat and temperature are essential concepts for everyone every day. The study of heat and temperature is part of an area of physics known as thermodynamics. It is not always easy to distinguish heat and temperature.
The concept of temperature has evolved from the common concepts of hot and cold. The scientific definition of temperature explains more than just our sense of hot and cold. Temperature is operationally defined as the quantity measured with a thermometer. Furthermore, temperature is...

Assessing Body Temperature - Temporal Artery

Assessing Body Temperature - Temporal Artery

Here is a stepwise guide to assessing the body temperature at the temporal artery using a temporal artery thermometer
Step 1: Perform hand hygiene and don a fresh pair of gloves to prevent cross-infection and ensure patient safety.
Step 2: Explain the procedure to the patient to establish trust. Clear communication establishes trust with the patient, ensures they understand what to expect, promotes cooperation, and enhances comfort during the procedure.
Step 3: Assess the patient's...

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Updated: Jun 10, 2025

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

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Published on: November 7, 2016

一种用于广泛温度范围分布式流量热量计的流体温度插值方法.

Tao Zhang¹, Yiming Lv¹, Tiancheng Xie¹

¹College of Metrology Measurement and Instrument, China Jiliang University, Xueyuan Street, No. 258, 310018 Hangzhou, China.

The Review of scientific instruments

|October 11, 2024

概括

此摘要是机器生成的。

一种新方法精确计算了用于高超音速燃料开发的管道中的流体温度. 这种分布式流量热度计方法增强了热力学分析和燃料选择,用于高速飞行应用.

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Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

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Experimental Methodology for Estimation of Local Heat Fluxes and Burning Rates in Steady Laminar Boundary Layer Diffusion Flames

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科学领域:

热力学是一种热力学.
流体动力学流体动力学
航空航天工程是航空航天工程.

背景情况:

精确的碳化合物燃料的热力学表征对于开发先进的推进系统至关重要,特别是超音速飞行.
传统的流量热量计在高温操作条件下,在管道内精确监测流体温度方面面临挑战.
了解流体温度对于确定热力学参数,如反应和混合热量至关重要.

研究的目的:

提出和验证一种新的分布式方法,用于在高温条件下计算管道中的流体温度.
为了提高用于航空航天应用的碳化合物燃料的热力学测量的准确性.
为改善高超音速飞行燃料的选择和开发提供基础.

主要方法:

开发了一种分布式方法,通过在不同功率级别的实验来插入值函数.
利用微元素分析来计算狭窄管道内的液体温度,在广泛的温度范围内.
使用数值模拟建立并验证了流量热量计的模拟模型.

主要成果:

拟议的方法通过流量热量计的数值模拟来验证.
使用n-decane在295.50609.38 K温度范围内进行的实验验证显示相对误差为-0.61%至1.24%.
该方法证明了在分布式流量热量计内有效估计流体温度.

结论:

开发的分布式方法提供了一种有效的方法来估计流量热量计中的流体温度.
这种技术提高了衡量碳化合物燃料关键热力学参数的能力.
这些发现支持推进高超音速飞行应用的燃料选择和设计.