Advanced gas turbine and internal combustion engine combustion chambers operate at highly elevated pressures and temperatures. Therefore, spray vaporization analysis cannot be limited to the atmospheric environment since evaporation strongly depends on ambient conditions. Presently, the effect of air pressure and temperature on droplet evaporation rate was investigated by using both a transient and a steady-state approach. A corresponding states model was derived for the steady-state evaporation rate for n-alkanes in the range of C₂–C₉ with an excellent fit quality and < 1% model uncertainty, considering the thermophysical data uncertainties. The model was tested for C₁, C₁₀, and C₁₂ n-alkanes as well with low success. The ambient conditions were evaluated in terms of reduced pressures and temperatures, covering the range of 0.02–0.5 and 1.2–1.5, respectively. However, the applicability of the model was limited to reduced temperature of 1.3–1.5, as higher discrepancy was observed between the trends of the different n-alkanes at lower temperatures. Since the heat-up phase of practical sprays in combustion chambers is often short, the present model might significantly reduce the computational effort required for liquid evaporation calculations.

先进的燃气轮机和内燃机燃烧室在较高的压力和温度下运行。因此，喷雾蒸发分析不能局限于大气环境，因为蒸发强烈取决于环境条件。目前，通过使用瞬态和稳态方法研究了气压和温度对液滴蒸发速率的影响。考虑到热物理数据的不确定性，针对C ₂ -C ₉范围内的正构烷烃的稳态蒸发速率，导出了相应的状态模型，具有良好的拟合质量，且模型不确定度小于1％。测试了模型的C ₁，C ₁₀和C ₁₂正构烷烃也不太成功。以减压和降温的方式评估了环境条件，分别覆盖了0.02–0.5和1.2–1.5的范围。然而，该模型的适用性仅限于降低温度1.3-1.5，因为在较低温度下不同正构烷烃的趋势之间观察到更高的差异。由于燃烧室中实际喷雾的加热阶段通常很短，因此本模型可能会大大减少液体蒸发计算所需的计算量。