抄録
Torealize high-performance cryogenic propulsion systems, the chilldown sequence has to be improved. Because the chilldown is carried out under low gravity, the effect of gravity on the two-phase flow, especially at low flow rate, should be investigated. To understand the physics under low gravity, an experiment was conducted using a sounding rocket. Two identical test sections with different mass flow rates simulated part of a turbopump, each of which has a complex flowpath including slits and a dead end. Using liquid nitrogen, the flight experiment obtained data of temperatures, pressures, void fractions, and video frames of liquid motion. Then, the flight experiment data were compared to the ground data taken under normal gravity, revealing that the slits played an important role in the chilldown process and that the test sections were quickly chilled down under low gravity. The slits of the test sections formed liquid jets, and their behaviors were different from those in the ground experiment. In the flight experiment, the jets easily reached the dead end of the test sections and cooled down the whole walls due to the increase in inertia and wettability; however, such behaviors were hardly observed in the ground experiment. The difference between the ground and flight is significant at lower flow rate.
| 元の言語 | English |
|---|---|
| ページ（範囲） | 91-103 |
| ページ数 | 13 |
| ジャーナル | Journal of Spacecraft and Rockets |
| 巻 | 56 |
| 発行部数 | 1 |
| DOI | |
| 出版物ステータス | Published - 2019 1 1 |
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ASJC Scopus subject areas
- Aerospace Engineering
- Space and Planetary Science
これを引用
Investigation of cryogenic chilldown in a complex channel under low gravity using a sounding rocket. / Kinefuchi, Kiyoshi; Sarae, Wataru; Umemura, Yutaka; Fujita, Takeshi; Okita, Koichi; Kobayashi, Hiroaki; Nonaka, Satoshi; Himeno, Takehiro; Satou, Tetsuya.
：: Journal of Spacecraft and Rockets, 巻 56, 番号 1, 01.01.2019, p. 91-103.研究成果: Article
}
TY - JOUR
T1 - Investigation of cryogenic chilldown in a complex channel under low gravity using a sounding rocket
AU - Kinefuchi, Kiyoshi
AU - Sarae, Wataru
AU - Umemura, Yutaka
AU - Fujita, Takeshi
AU - Okita, Koichi
AU - Kobayashi, Hiroaki
AU - Nonaka, Satoshi
AU - Himeno, Takehiro
AU - Satou, Tetsuya
PY - 2019/1/1
Y1 - 2019/1/1
N2 - Torealize high-performance cryogenic propulsion systems, the chilldown sequence has to be improved. Because the chilldown is carried out under low gravity, the effect of gravity on the two-phase flow, especially at low flow rate, should be investigated. To understand the physics under low gravity, an experiment was conducted using a sounding rocket. Two identical test sections with different mass flow rates simulated part of a turbopump, each of which has a complex flowpath including slits and a dead end. Using liquid nitrogen, the flight experiment obtained data of temperatures, pressures, void fractions, and video frames of liquid motion. Then, the flight experiment data were compared to the ground data taken under normal gravity, revealing that the slits played an important role in the chilldown process and that the test sections were quickly chilled down under low gravity. The slits of the test sections formed liquid jets, and their behaviors were different from those in the ground experiment. In the flight experiment, the jets easily reached the dead end of the test sections and cooled down the whole walls due to the increase in inertia and wettability; however, such behaviors were hardly observed in the ground experiment. The difference between the ground and flight is significant at lower flow rate.
AB - Torealize high-performance cryogenic propulsion systems, the chilldown sequence has to be improved. Because the chilldown is carried out under low gravity, the effect of gravity on the two-phase flow, especially at low flow rate, should be investigated. To understand the physics under low gravity, an experiment was conducted using a sounding rocket. Two identical test sections with different mass flow rates simulated part of a turbopump, each of which has a complex flowpath including slits and a dead end. Using liquid nitrogen, the flight experiment obtained data of temperatures, pressures, void fractions, and video frames of liquid motion. Then, the flight experiment data were compared to the ground data taken under normal gravity, revealing that the slits played an important role in the chilldown process and that the test sections were quickly chilled down under low gravity. The slits of the test sections formed liquid jets, and their behaviors were different from those in the ground experiment. In the flight experiment, the jets easily reached the dead end of the test sections and cooled down the whole walls due to the increase in inertia and wettability; however, such behaviors were hardly observed in the ground experiment. The difference between the ground and flight is significant at lower flow rate.
UR - http://www.scopus.com/inward/record.url?scp=85063059872&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85063059872&partnerID=8YFLogxK
U2 - 10.2514/1.A34222
DO - 10.2514/1.A34222
M3 - Article
AN - SCOPUS:85063059872
VL - 56
SP - 91
EP - 103
JO - Journal of Spacecraft and Rockets
JF - Journal of Spacecraft and Rockets
SN - 0022-4650
IS - 1
ER -