The heterogeneous reaction of fuel-lean hydrogen/air mixtures over platinum was investigated numerically in laminar flat-plate flows. To simulate low-Reynods-number flows and leading edge zones, the simulation code in this research was build by using a two-dimension elliptic fluid mechanical model. The code was employed to compute the reactive flow of hydrogen/air mixture (Φ = 0.4) at atmospheric pressure and at a inlet velocity of 10 cm/sec. The result shows the catalytic reactions were limited by hydrogen-diffusion. By using the existing surface-surface mechanism (Langmuir model), the calculated near surface OH concentration was too low to be observed experimentally. Adding gas-surface reactions (Eley-Ridel model) in the mechanism is recommended to explain the strong OH-LIPF signal showed in previous experimental observation.
|Number of pages||8|
|Journal||Hangkong Taikong ji Minhang Xuekan/Journal of Aeronautics, Astronautics and Aviation|
|Publication status||Published - 2006 Apr 1|
All Science Journal Classification (ASJC) codes
- Aerospace Engineering
- Space and Planetary Science