Study on Nonlinear Dynamics Using the State Space of Combustion Oscillation in a Rocket Combustor
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- ARAI Fumiya
- Graduate School of Science and Technology, Nihon University
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- IEMURA Kazuki
- Graduate School of Science and Technology, Nihon University
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- SAITO Masanori
- College of Science and Technology, Nihon University
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- TANABE Mitsuaki
- College of Science and Technology, Nihon University
抄録
<p>Combustion oscillation in a rocket combustor was analyzed using a Variational Auto-Encoder (VAE). Dimension reductions were conducted on various physical quantities (p′, ˙q′, etc.) in the combustor. Orthogonal modes were obtained using proper orthogonal decomposition for the output of VAE. Pumping and damping regions in the combustor were identified using the distribution of the Rayleigh Index for each mode. Three characteristic modes were identified that supply energy to the oscillation. A phase plane was spanned by the latent variables obtained by the reductions. Activation of each of the characteristic six modes was mapped on the plane. The three characteristic modes were found to be activated at different phases. From the trajectory of the oscillation on the plane, the plane was confirmed to satisfy the requirements to be a state space. In the high-pressure amplitude phase, the pumping regions near the combustor wall were clarified.</p>
収録刊行物
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- TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES
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TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES 66 (5), 156-163, 2023
一般社団法人 日本航空宇宙学会
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詳細情報 詳細情報について
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- CRID
- 1390860322095835648
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- ISSN
- 21894205
- 05493811
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- Crossref
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- 抄録ライセンスフラグ
- 使用不可