Flowfield characteristics of a hypermixer interacting with transverse injection in supersonic flow

Chae Hyoung Kim; In Seuck Jeung; Byungil Choi; Toshinori Kouchi; Goro Masuya

doi:10.2514/1.J051588

Flowfield characteristics of a hypermixer interacting with transverse injection in supersonic flow

Chae Hyoung Kim, In Seuck Jeung, Byungil Choi, Toshinori Kouchi, Goro Masuya

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

Nonreacting experiments were conducted at Mach 2 to understand the relationship between a wall-mounted alternating-ramp-wedge-type hypermixer and transverse injection compared with a step mixer. Experimental techniques such as schlieren visualization and stereoscopic particle image velocimetry were employed to study the three-dimensional flowfield with vortex structures induced by the interaction between the mixer and transverse injection. Without injection, the hypermixer creates a region that contains vortical motions. When a transverse jet is injected in the vortical region, flow parameters on mixing performance, such as the penetration height, vorticity, and turbulent stress, are improved. Three turbulent-stress components show relatively distinct distributions, and strong turbulent stresses are observed at the upper side of the jet plume. Turbulent-stress distributions are significantly associated with strain rate, which peaks along the sonic line of the jet plume.

Original language	English
Pages (from-to)	1742-1753
Number of pages	12
Journal	AIAA Journal
Volume	50
Issue number	8
DOIs	https://doi.org/10.2514/1.J051588
Publication status	Published - Aug 2012
Externally published	Yes

ASJC Scopus subject areas

Aerospace Engineering

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title = "Flowfield characteristics of a hypermixer interacting with transverse injection in supersonic flow",

abstract = "Nonreacting experiments were conducted at Mach 2 to understand the relationship between a wall-mounted alternating-ramp-wedge-type hypermixer and transverse injection compared with a step mixer. Experimental techniques such as schlieren visualization and stereoscopic particle image velocimetry were employed to study the three-dimensional flowfield with vortex structures induced by the interaction between the mixer and transverse injection. Without injection, the hypermixer creates a region that contains vortical motions. When a transverse jet is injected in the vortical region, flow parameters on mixing performance, such as the penetration height, vorticity, and turbulent stress, are improved. Three turbulent-stress components show relatively distinct distributions, and strong turbulent stresses are observed at the upper side of the jet plume. Turbulent-stress distributions are significantly associated with strain rate, which peaks along the sonic line of the jet plume.",

author = "Kim, {Chae Hyoung} and Jeung, {In Seuck} and Byungil Choi and Toshinori Kouchi and Goro Masuya",

note = "Funding Information: The authors acknowledge the support from the second stage of the BK 21 in 2009, the Mid-Career Researcher Program through a National Research Foundation grant funded by the Ministry of Education, Science and Technology, the space program by the Korea Aerospace Research Institute, the Institute of Advanced Aerospace Technology of Seoul National University in the Republic of Korea, and the Global COE Program of Tohoku University in Japan.",

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AU - Choi, Byungil

AU - Kouchi, Toshinori

AU - Masuya, Goro

N1 - Funding Information: The authors acknowledge the support from the second stage of the BK 21 in 2009, the Mid-Career Researcher Program through a National Research Foundation grant funded by the Ministry of Education, Science and Technology, the space program by the Korea Aerospace Research Institute, the Institute of Advanced Aerospace Technology of Seoul National University in the Republic of Korea, and the Global COE Program of Tohoku University in Japan.

PY - 2012/8

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N2 - Nonreacting experiments were conducted at Mach 2 to understand the relationship between a wall-mounted alternating-ramp-wedge-type hypermixer and transverse injection compared with a step mixer. Experimental techniques such as schlieren visualization and stereoscopic particle image velocimetry were employed to study the three-dimensional flowfield with vortex structures induced by the interaction between the mixer and transverse injection. Without injection, the hypermixer creates a region that contains vortical motions. When a transverse jet is injected in the vortical region, flow parameters on mixing performance, such as the penetration height, vorticity, and turbulent stress, are improved. Three turbulent-stress components show relatively distinct distributions, and strong turbulent stresses are observed at the upper side of the jet plume. Turbulent-stress distributions are significantly associated with strain rate, which peaks along the sonic line of the jet plume.

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Flowfield characteristics of a hypermixer interacting with transverse injection in supersonic flow

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