Micro Aerial Vehicles require extremely lightweight propulsion systems. This work examines the possibility of using a Phase-Change Material propulsion system, in which the transformation rate from liquid to vapor has a prominent role. The transformation is initiated by nucleation of vapor bubbles due to fast depressurization, followed by nuclei growth till they coalesce, forming a continuous vapor phase which later drive a turbine. The limiting rate of phase transition is investigated in terms of the critical properties of several fluids and their initial conditions. Out of 11 investigated fluids, Hydrogen was found to provide the most promising results in terms of specific power and energy. However, when power and energy densities are to be considered, Neon may be preferable.
|Number of pages||11|
|State||Published - 1 Jan 2020|
|Event||60th Israel Annual Conference on Aerospace Sciences, IACAS 2020 - Tel Aviv and Haifa, Israel|
Duration: 4 Mar 2020 → 5 Mar 2020
|Conference||60th Israel Annual Conference on Aerospace Sciences, IACAS 2020|
|City||Tel Aviv and Haifa|
|Period||4/03/20 → 5/03/20|