This paper investigates how the choice of progress variable in tabulated chemistry affects the mass burning rates of premixed laminar flames. Simulations are carried out using finite rate, detailed chemistry (DC) and Flamelet Generated Manifolds (FGM). Through comparison of detailed chemistry and FGM (using different progress variable definitions), it is found that for FGM the mass burning rate depends on the choice of progress variable and thus results in a different mass burning rate than detailed chemistry. Since the mass burning rate is influenced by stretch and transport phenomena, the effects of these on mass burning rates are analysed. While FGM qualitatively predicts the effect of stretch on the mass burning rate compared to detailed chemistry, there are quantitative differences. It is shown that this is mainly caused by a lack of projection in usual FGM applications. When the projection of the source term and the diffusion term are included in the table, FGM becomes independent of the choice of progress variable and the effects of stretch are better represented by FGM similar to detailed chemistry.

本文研究了列表化学中进程变量的选择如何影响预混层流火焰的质量燃烧速率。使用有限速率、详细化学 (DC)和Flamelet Generated Manifolds (FGM)进行模拟. 通过详细化学和 FGM 的比较（使用不同的进程变量定义），发现对于 FGM，质量燃烧速率取决于进程变量的选择，因此导致与详细化学不同的质量燃烧速率。由于质量燃烧率受拉伸和传输现象的影响，因此分析了这些对质量燃烧率的影响。虽然 FGM 与详细的化学相比，定性地预测了拉伸对质量燃烧率的影响，但存在数量上的差异。结果表明，这主要是由于在通常的 FGM 应用中缺乏投影造成的。当表中包含源项和扩散项的投影时，