درباره ما
NACA-ARR-E5F07
Heat-transfer tests of aqueous ethylene glycol solutions in an electrically heated tube
Year: 1945
Abstract: As part of an investigation of the cooling characteristics of liquid-cooled engines, tests were conducted with an electrically heated single-tube heat exchanger to determine the heat-transfer characteristics of an-e-2 ethylene glycol and other ethylene glycol-water mixtures. Similar tests were conducted with water and commercial butanol (n-butyl alcohol) for check purposes. The results of tests conducted at an approximately constant liquid-flow rate of 0.67 pound per second (Reynolds number, 14,500 to 112,500) indicate that at an average liquid temperature 200 degrees f, the heat-transfer coefficients obtained using water, nominal (by volume) 30 percent-70 percent and 70 percent-30 percent glycol-water mixtures are approximately 3.8, 2.8, and 1.4 times higher, respectively, than the heat-transfer coefficients obtained using an-e-2 ethylene glycol.
Subject: AIRCRAFT ENGINES
Show full item record
| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T16:51:21Z | |
| date available | 2017-09-04T16:51:21Z | |
| date copyright | 01/01/1945 | |
| date issued | 1945 | |
| identifier other | WQONEEAAAAAAAAAA.pdf | |
| identifier uri | https://yse.yabesh.ir/std/handle/yse/115020 | |
| description abstract | As part of an investigation of the cooling characteristics of liquid-cooled engines, tests were conducted with an electrically heated single-tube heat exchanger to determine the heat-transfer characteristics of an-e-2 ethylene glycol and other ethylene glycol-water mixtures. Similar tests were conducted with water and commercial butanol (n-butyl alcohol) for check purposes. The results of tests conducted at an approximately constant liquid-flow rate of 0.67 pound per second (Reynolds number, 14,500 to 112,500) indicate that at an average liquid temperature 200 degrees f, the heat-transfer coefficients obtained using water, nominal (by volume) 30 percent-70 percent and 70 percent-30 percent glycol-water mixtures are approximately 3.8, 2.8, and 1.4 times higher, respectively, than the heat-transfer coefficients obtained using an-e-2 ethylene glycol. | |
| language | English | |
| title | NACA-ARR-E5F07 | num |
| title | Heat-transfer tests of aqueous ethylene glycol solutions in an electrically heated tube | en |
| type | standard | |
| page | 40 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1945 | |
| contenttype | fulltext | |
| subject keywords | AIRCRAFT ENGINES | |
| subject keywords | COOLANTS | |
| subject keywords | ETHYLENE COMPOUNDS | |
| subject keywords | FLOW VELOCITY | |
| subject keywords | GLYCOLS | |
| subject keywords | HEAT TRANSFER | |
| subject keywords | HEAT TRANSFER COEFFICIENTS | |
| subject keywords | LIQUID COOLING | |
| subject keywords | LIQUID FLOW | |
| subject keywords | MIXTURES | |
| subject keywords | REYNOLDS NUMBER | |
| subject keywords | TESTS | |
| subject keywords | TUBE HEAT EXCHANGERS | |
| subject keywords | WALL TEMPERATURE | |
| subject keywords | WATER |