Loading...
Please wait, while we are loading the content...
Similar Documents
A theoretical and experimental study of turbulent evaporating sprays
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Zhang, Q. F. Shuen, J. S. Faeth, G. M. Solomon, A. S. P. |
| Copyright Year | 1984 |
| Description | Measurements and analysis limited to the dilute portions of turbulent evaporating sprays, injected into a still air environment were completed. Mean and fluctuating velocities and Reynolds stress were measured in the continuous phase. Liquid phase measurements included liquid mass fluxes, drop sizes and drop size and velocity correlation. Initial conditions needed for model evaluation were measured at a location as close to the injector exit as possible. The test sprays showed significant effects of slip and turbulent dispersion of the discrete phase. The measurements were used to evaluate three typical models of these processes: (1) a locally homogeneous flow (LHF) model, where slip between the phases were neglected; (2) a deterministic separated flow (DSF) model, where slip was considered but effects of drop dispersion by turbulence were ignored; and (3) a stochastic separated flow (SSF) model, where effects of interphase slip and turbulent dispersion were considered using random-walk computations for drop motion. For all three models, a k-epsilon model as used to find the properties of the continuous phase. The LHF and DSF models did not provide very satisfactory predictions for the present measurements. In contrast, the SSF model performed reasonably well--with no modifications in the prescription of eddy properties from its original calibration. |
| File Size | 4526829 |
| Page Count | 142 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19840024320 |
| Archival Resource Key | ark:/13960/t3wt3hq16 |
| Language | English |
| Publisher Date | 1984-09-01 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Propulsion And Power Turbulent Flow Transport Properties Dispersing Stochastic Processes K-epsilon Turbulence Model Dynamic Models Sprayers Evaporation Particle Laden Jets Combustion Chambers Mass Transfer Probability Density Functions Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
