Kerosene evaporation rate in high temperature air stationary and convective environment

- The aviation & common kerosene evaporation character was studied by experiments.
- Higher convective velocity is, greater evaporation rate value becomes.
- A new evaporation model from two dimensional analysis theory was proposed.
- The new model predictions agree with experimental data in stationary & convective environment.
- The new model is better than the stagnant film theory evaporation model.

The liquid fuel evaporation rate, especially for aviation kerosene, is important in both aero-engine combustion chamber design process and spray combustion numerical simulation modeling, while the evaporation rate in high temperature stationary and convective environment is lack of both experimental data validation and theoretical analysis studies. In this paper, firstly the common kerosene and aviation kerosene evaporation characteristic was measured by experiments. The liquid fuel's single droplet was suspended in high temperature stationary or convective air environment. The evaporation characteristic was delineated by more than 70 sets of effective experimental data. Under the experimental condition in this paper, the higher the convective velocity is, the greater the droplet evaporation rate value becomes. Also there is difference between the common kerosene and aviation kerosene in evaporation rate value in the convective environment. Generally, the common kerosene has higher evaporation rate value than the aviation kerosene's in the same condition. Secondly, the Ranz-Marshall droplet evaporation model which is widely used and rooted from the stagnant film analysis method has been compared with the experimental results. There is certain deviation between the Ranz-Marshall model prediction results and experimental data. Then a two-dimensional analysis evaporation model (TDAEM) was tested by both stationary and convective experimental data. The TDAEM model's prediction results agree well with the experimental data which is from both this paper and other references.