Temperature Measurement of a Burning Surface by a Thermocouple II
説明
A thermocouple has been used to measure the temperature profile near the surface of a burning solid propellant. An inverted U-shaped thermocouple was better than an inverted V-shaped one in this situation, because there was less heat loss through the leads. However, producing an efficient inverted U-shaped thermocouple and embedding it perfectly parallel to the burning surface are difficult. In this study, the error introduced by heat conduction through the thermocouple leads was examined experimentally, using ammonium perchlorate. The decrease in temperature due to heat conduction through the leads of a 50-µm thermocouple was estimated using a simple expression. The results showed that for a 50-µm thermocouple, a lead angle greater than 120 deg is necessary to prevent errors due to heat conduction losses from causing a deviation that exceeds the normal experimental scatter in the data. In addition, it was found that the temperature of the burning surface of ammonium perchlorate is between 460 and 470 ◦ Ca tatmospheric pressure.
収録刊行物
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- 41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit
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41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit 2005-07-10
American Institute of Aeronautics and Astronautics (AIAA)
