TURBINE NOZZLE GUIDE VANE ENDWALL AEROTHERMAL PERFORMANCE WITH PULSATILE FLOW INDUCED BY HYDROGEN COMBUSTION
水素燃焼による脈動流を伴うタービンノズル案内翼端壁の空気熱性能 (AI 翻訳)
Bai, Bo, Zhang, Hao, Li, Zhigang, Li, Jun
🤖 gxceed AI 要約
日本語
本論文は、水素燃焼による脈動流がタービン端壁の空気熱性能に与える影響をURANS数値予測とFFTスペクトル解析により調査した。脈動周波数と振幅がフィルム冷却効果に与える影響を系統的に解明し、水素燃焼に起因する流れ脈動がタービン翼列を周波数減衰なく伝播することを明らかにした。
English
This paper investigates the effects of pulsatile flow induced by hydrogen combustion on turbine endwall aerothermal performance using URANS predictions and FFT analysis. It systematically examines impacts of pulsation frequency and amplitude on film cooling, revealing that flow pulsations propagate through turbine cascades without frequency attenuation and degrade cooling effectiveness by up to 10.1%.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
水素燃焼ガスタービンは日本の脱炭素戦略の一つだが、本論文は基礎的な流体・伝熱研究であり、日本のGX政策や開示実務への直接的な示唆は限られる。ただし、水素社会実現に向けた技術的課題の理解に貢献する。
In the global GX context
While hydrogen combustion in gas turbines is a global decarbonization pathway, this paper is a specialized engineering study on flow pulsations. It does not address disclosure or policy, but contributes to technical knowledge needed for hydrogen adoption.
👥 読者別の含意
🔬研究者:Provides detailed CFD and spectral analysis on hydrogen combustion-induced pulsations for turbine design researchers.
📄 Abstract（原文）
Due to its superior thermodynamic properties and zerocarbon emission characteristics, hydrogen combustion in gas turbines is being actively promoted as a promising strategy for achieving worldwide decarbonization goals. However, significantly intensified flow pulsations represent a major obstacle. To clarify the impacts of flow pulsations induced by hydrogen combustion on the turbine endwall aerothermal performance, the URANS numerical predictions and FFT spectral analysis were performed in this paper, based on measured flow pulsation data from realistic hydrogen combustion tests. This study systematically investigated the impacts of pulsation frequencies (f = 1000 Hz, 3000 Hz, and 5000 Hz) and pulsation amplitudes (K = 5% and 10%) on the endwall secondary flow fields and film cooling performance at design conditions. Key findings revealed that flow pulsations induced by hydrogen combustion are detrimental to the endwall film cooling performance and potentially contribute to a non-monotonic decrease in film cooling effectiveness of 3.8%-10.1% as pulsation frequencies increase. At low pulsation amplitude conditions (K = 5%), the maximum and minimum reductions in endwall film cooling effectiveness are observed at f = 3000 Hz and 5000 Hz, respectively. Increased pulsation amplitudes (K = 10%) will introduce additional degradation in endwall film cooling performance, and the reduction magnitudes present distinct frequency sensitivity, with responses ranging from 14.2% to 0.2%. Fluctuation peaks in film cooling effectiveness are found in regions downstream of film holes, near the vane pressure side and vane passage throat, and pitch-averaged fluctuation magnitudes are less than 10% within the vane passage. Notably, flow pulsations induced by hydrogen combustion propagate through turbine cascades without frequency attenuation, as revealed by spectral analysis.
🔗 Provenance — このレコードを発見したソース
- Zenodo https://zenodo.org/records/20013725first seen 2026-05-14 21:27:18 · last seen 2026-05-14 21:38:58
🔔 こうした論文の新着を逃したくない方は キーワードアラート に登録（無料・3キーワードまで）。
gxceed は公開メタデータに基づく研究支援データセットです。要約・翻訳・解説は AI 支援で生成されています。 最終的な解釈・検証は利用者が原典資料に基づいて行うことを前提とします。