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Dive into the research topics where Kazuki Sakaki is active.

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Featured researches published by Kazuki Sakaki.


51st AIAA/SAE/ASEE Joint Propulsion Conference | 2015

Optical Measurements of Ethanol/Liquid Oxygen Rocket Engine Combustor with Planar Pintle Injector

Kazuki Sakaki; Hiromitsu Kakudo; Shinji Nakaya; Mitsuhiro Tsue; Hikaru Isochi; Kyohei Suzuki; Kazunori Makino; Tetsuo Hiraiwa

The pintle injector is a promising candidate of the propellant injection systems for a rocket engine with deep throttling capability which is essential for future space transportation missions. However, studies focusing on combustion phenomena in a rocket engine with a pintle injector is rather limited. In this study, optical measurements inside an ethanol/liquid oxygen rocket engine combustor with a planar pintle injector are conducted to clarify spray and flame structures in the pintle injector. Combustion tests where the chamber pressure is 0.36 to 0.40MPa and O/F is 1.15 to 1.40 are conducted. Effects of the injection configuration on spray structures are also evaluated. High speed imaging techniques are used to observe the flame and spray structures under hot fire conditions. Strong chemiluminescence of CH is observed in the vicinity of the impinging point of two propellants. Luminous flame is observed intermittently in the vicinity of the faceplate and the upper wall of the combustor with the direct observation of the flame. Characteristic exhaust velocity efficiency with oxidizercentered configuration is lower than fuel-centered configuration due to the large amount of propellant impinging on the upper wall of the combustor. Periodical phenomena with the frequency of approximately 300Hz which can be related to atomization processes are also observed.


Proceedings of the Combustion Institute | 2015

Ignition and supersonic combustion behavior of liquid ethanol in a scramjet model combustor with cavity flame holder

Shinji Nakaya; Yuta Hikichi; Yoshiki Nakazawa; Kazuki Sakaki; Minho Choi; Mitsuhiro Tsue; Michikata Kono; Sadatake Tomioka


Transactions of The Japan Society for Aeronautical and Space Sciences | 2015

Fundamental Combustion Characteristics of Ethanol/Liquid Oxygen Rocket Engine Combustor with Planar Pintle-type Injector

Kazuki Sakaki; Minho Choi; Shinji Nakaya; Mitsuhiro Tsue; Tetsuo Hiraiwa


52nd AIAA/SAE/ASEE Joint Propulsion Conference | 2016

Performance Evaluation of Rocket Engine Combustors using Ethanol/Liquid Oxygen Pintle Injector

Kazuki Sakaki; Hiromitsu Kakudo; Shinji Nakaya; Mitsuhiro Tsue; Ryuichiro Kanai; Kyohei Suzuki; Takahiro Inagawa; Tetsuo Hiraiwa


Journal of Propulsion and Power | 2017

Combustion Characteristics of Ethanol/Liquid-Oxygen Rocket-Engine Combustor with Planar Pintle Injector

Kazuki Sakaki; Hiromitsu Kakudo; Shinji Nakaya; Mitsuhiro Tsue; Kyohei Suzuki; Ryuichiro Kanai; Takahiro Inagawa; Tetsuo Hiraiwa


Combustion and Flame | 2018

Longitudinal combustion instability of a pintle injector for a liquid rocket engine combustor

Kazuki Sakaki; Tomokazu Funahashi; Shinji Nakaya; Mitsuhiro Tsue; Ryuichiro Kanai; Kyohei Suzuki; Takahiro Inagawa; Tetsuo Hiraiwa


Journal of The Japan Society for Aeronautical and Space Sciences | 2017

Optical Measurements for Combustion Oscillation Behaviors of a Pintle Injector

Kazuki Sakaki; Tomokazu Funahashi; Shinji Nakaya; Mitsuhiro Tsue; Ryuichiro Kanai; Kyohei Suzuki; Takahiro Inagawa; Tetsuo Hiraiwa


Journal of The Japan Society for Aeronautical and Space Sciences | 2017

Effects of Propellant Momentum Ratio on Combustion Behavior in an Ethanol/Liquid Oxygen Rocket Engine Combustor with a Planar Pintle-type Injector

Hiromitsu Kakudo; Kazuki Sakaki; Shinji Nakaya; Mitsuhiro Tsue; Ryuichiro Kanai; Takahiro Inagawa; Tetsuo Hiraiwa


The Proceedings of the Thermal Engineering Conference | 2015

F143 Behavior of Spark Ignition in Simulated Exhaust Gas Recirculation Ambience Using Rapid Compression Machine

Osamu Imamura; Yuya Fukumi; Montoya Arina Dominik; Kazuhiro Akihama; Kazuki Sakaki; Shinji Nakaya; Mitsuhiro Tsue


Journal of The Japan Society for Aeronautical and Space Sciences | 2015

Measurement of Combustion Efficiency in an Afterburner for a Pre-Cooled Turbo Jet Engine

Shonosuke Kita; George Ianus; Kazuya Iwata; Kazuki Sakaki; Shunsuke Nishida; Hideyuki Taguchi; Mikiya Araki; Shuhei Takahashi; Osamu Imamura; Shinji Nakaya; Mitsuhiro Tsue

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Mitsuhiro Tsue

Osaka Prefecture University

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Tetsuo Hiraiwa

Japan Aerospace Exploration Agency

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Hideyuki Taguchi

Japan Aerospace Exploration Agency

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Kazuhiro Akihama

College of Industrial Technology

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