Regression rate measurement with fiber optic technique for paraffin-based fuels in an hybrid scaled motor engine

The present work aims at developing an optical fiber sensor for local regression rate measurement in a lab-scale hybrid rocket engine. Those measures are important to understand the details of the combustion phenomena, in particular in paraffin-based fuels, a field with a promising future considering the high regression rate exhibited. The firing runs are performed by a lab-scale motor that was purpousely modified. Paraffin-based fuel formulations were considered in the analysis. Fuel formulation prepared by SasolWax 0907, eventually reinforced by SEBS, is considered in the analysis. Data reduced by TOT approaches (MB, and geometry change) were contrasted with local, time-resolved measurements by a fiber optic sensor. Achieved results show a difference between TOT and FO measurements. The results could be considered in accord both with local and average measures.

Sviluppo di un modello in scala di motore ibrido per combustione di combustibili a base paraffinica. Sviluppo e verifica della fattibilità dell'uso di un sensore a base di fibre ottiche per misure locali della velocità di regressione sul motore stesso.