| タイトル | Miniature sheathed thermocouples for turbine blade temperature measurement |
| 本文（外部サイト） | http://hdl.handle.net/2060/19740014937 |
| 著者（英） | Krause, L. N.; Holanda, R.; Glawe, G. E. |
| 著者所属（英） | NASA Lewis Research Center |
| 発行日 | 1974-05-01 |
| 言語 | eng |
| 内容記述 | An investigation was made of sheathed thermocouples for turbine blade temperature measurements. Tests were performed on the Chromel-Alumel sheathed thermocouples with both two-wire and single-wire configurations. Sheath diameters ranged from 0.25 to 0.76 mm, and temperatures ranged from 1080 to 1250 K. Both steady-state and thermal cycling tests were performed for times up to 450 hr. Special-order and commercial-grade thermocouples were tested. The tests showed that special-order single-wire sheathed thermocouples can be obtained that are reliable and accurate with diameters as small as 0.25 mm. However, all samples of 0.25-mm-diameter sheathed commercial-grade two-wire and single-wire thermocouples that were tested showed unacceptable drift rates for long-duration engine testing programs. The drift rates were about 1 percent in 10 hr. A thermocouple drift test is recommended in addition to the normal acceptance tests in order to select reliable miniature sheathed thermocouples for turbine blade applications. |
| NASA分類 | INSTRUMENTATION AND PHOTOGRAPHY |
| レポートNO | 74N23050
E-7838
NASA-TN-D-7671 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/194691 |
