Theoretical and numerical study on longitudinal combustion instability in liquid propellant rocket engines for the achievement of predictive capability using a quasi-1D model
| Componente | Categoria |
|---|---|
| Francesco Nasuti | Tutor di riferimento |
The a-priori prediction of high frequency combustion instability will certainly favorably impact on the development costs of new liquid propellant rocket engines. Achieving such objective with a reduced order model implies a significant reduction of the experimental efforts and costs as well as of the massive high-fidelity numerical simulations which are mandatory in order to investigate this issue.
An in-house quasi-1D Eulerian solver for multispecies employing an n-tau heat release rate to acoustics coupling function has been developed to face longitudinal high-frequency instability problems. Such class of solvers need the strict link between the acoustics to the unsteady heat release rate, in terms of timing (tau) and intensity (n) to be known and given as input.
The main goal of the proposed research is to achieve the capability to predict such strict coupling and therefore giving to the solver the proficiency of predicting combustion instability occurrence starting only from the geometry of the chamber and from the chemical features of the propellants.