Cui Yanyu, Xiong Changhong, Yang Shugang, Ding Qingmiao, Zhang Kai, Xu Chen
Civil Aviation University of China, Dongli District, Tianjin, China.
Liaohe Oilfield of China National Petroleum Corp, Panjin, Liaoning, China.
PLoS One. 2025 May 6;20(5):e0321880. doi: 10.1371/journal.pone.0321880. eCollection 2025.
Blending aviation biofuel with conventional jet fuel helps reduce carbon emissions in aviation. However, high blending ratios (≥50%) can impact engine atomization performance. This study uses a three-dimensional simulation of gas-liquid flow in a centrifugal nozzle with the volume of fluid (VOF) method to evaluate the atomization performance of aviation biofuels with traditional jet fuel at different blending ratios (0%, 40%, 60%, 80%, 100%), under varying temperatures and nozzle inlet pressures. The simulation results align well with empirical data, showing deviations of less than 10%. As the inlet pressure increases from 0.2 MPa to 1.0 MPa, the nozzle outlet velocity increases by 127.0%, and the liquid film thickness decreases by 41.8%, improving atomization performance. At 0.2 MPa, higher blending ratios (≥50%) leads to thicker liquid films, reducing atomization efficiency. However, at 1.0 MPa, the effect of blending ratio on atomization becomes less significant, with the difference in liquid film thickness reduced to 4.2%. Fuel temperature significantly affects atomization, with more noticeable differences between low- and high-blending fuels. As temperature rises from 0°C to 50°C, liquid film thickness decreases, with a reduction of 14.6% for low-blending fuel and 52.8% for high-blending fuel.
将航空生物燃料与传统喷气燃料混合有助于减少航空业的碳排放。然而，高混合比（≥50%）会影响发动机的雾化性能。本研究采用流体体积（VOF）法对离心喷嘴内的气液流动进行三维模拟，以评估在不同温度和喷嘴入口压力下，不同混合比（0%、40%、60%、80%、100%）的航空生物燃料与传统喷气燃料的雾化性能。模拟结果与实验数据吻合良好，偏差小于10%。随着入口压力从0.2MPa增加到1.0MPa，喷嘴出口速度增加127.0%，液膜厚度减小41.8%，雾化性能得到改善。在0.2MPa时，较高的混合比（≥50%）会导致液膜变厚，降低雾化效率。然而，在1.0MPa时，混合比对雾化的影响变得不那么显著，液膜厚度差异降至4.2%。燃料温度对雾化有显著影响，低混合燃料和高混合燃料之间的差异更为明显。当温度从0°C升至50°C时，液膜厚度减小，低混合燃料减少14.6%，高混合燃料减少52.8%。
