CFD Prediction of Partload CO Emissions Using a Two-Timescale Combustion Model

被引：16

作者：

Wegner, Bernhard ^{[1
]}

Gruschka, Uwe ^{[1
]}

Krebs, Werner ^{[1
]}

Egorov, Y. ^{[2
]}

Forkel, H. ^{[2
]}

Ferreira, J. ^{[2
]}

Aschmoneit, Kai ^{[3
]}

机构：

[1] Siemens AG, Energy Sector, D-45478 Mulheim, Germany

[2] ANSYS Germany, D-83624 Otterfing, Germany

[3] Tech Univ Darmstadt, EKT, D-64287 Darmstadt, Germany

来源：

JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME | 2011年 / 133卷 / 07期

关键词：

CFD combustion model; emissions; CO prediction;

D O I：

10.1115/1.4002021

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Today's and future electric power generation is characterized by a large diversification using all kind of sources, including renewables resulting in noncoherent fluctuations of power supply and power usage. In this context, gas turbines offer a high operational flexibility and a good turn down ratio. In order to guide the design and down select promising solutions for improving partload emissions, a new combustion model based on the assumption of two separate timescales for the fast premixed flame stabilization and the slow post flame burnout zone is developed within the commercial computational fluid dynamics (CFD) code ANSYS CFX. This model enables the prediction of CO emissions generally limiting the turn down ratio of gas turbines equipped with modern low NO(x) combustion systems. The model is explained and validated at lab scale conditions. Finally, the application of the model for a full scale analysis of a gas turbine combustion system is demonstrated. [DOI: 10.1115/1.4002021]

引用

页数：7

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