|Statement||by J-S. Shuen, A.S.P. Solomon, and G.M. Faeth.|
|Series||NASA contractor report -- NASA CR-173778.|
|Contributions||Solomon, A. S. P., Faeth, G. M., Lewis Research Center.|
|The Physical Object|
Get this from a library! The structure of evaporating and combusting sprays: measurements and predictions: semi-annual status report for the period January 1, to J [J -S Shuen; A S P Solomon; G M Faeth; Lewis Research Center.] An apparatus developed, to allow observations of monodisperse sprays, consists of a methane-fueled turbulent jet diffusion flame with monodisperse methanol drops injected at the burner exit. Mean and fluctuating-phase velocities, drop sizes, drop-mass fluxes and mean-gas temperatures were measured. Initial drop diameters of and microns are being considered in order to vary drop Complete measurements of the structure of nonevaporating, evaporating and combusting sprays for sufficiently well defined boundary conditions to allow evaluation of models of these processes were obtained. The development of rational design methods for aircraft combustion chambers and other devices involving spray combustion were :// Structure of Evaporating and Combusting Sprays: Measurements and Predictions. Semiannual Status Report, 1 Jan. - 30 Jun. 著者 Shuen, J. S 著者 Solomon, A. S. P 著者 Faeth, G. M 大きさ、容量等 microfiche 33 p 注記 資料種別: [microform]
Abstract The dense spray region involves low void fractions, effects of nearby drops on drop transport rates, appreciable rates of drop collisions and significant effects of drops on the turbulence properties of the flow. Spray models developed by Anderson et al., 1 Butler et al. 4 and Gosman and Johns treat some aspects of the dilute spray region; however, the model reported by O'Rourke Additional Physical Format: Microfiche version: Shuen, J.-S. Structure of dilute combusting sprays. 2 microfiches. (OCoLC) Paper version: Shuen, :// methods used to analyze dilute sprays. These procedures are then used to interpret recent measurements of the structure. of dilute sprays and related dispersed turbulent jets. The following flows are considered particle-laden jets; nonevaporating, evaporating and combusting sprays; and noncondensing and condensing bubbly jets. The actual data Computations are reported on the detailed structures of unconfined turbulent combusting sprays. Favre-averaged gas-phase equations are used and a k-ε-g turbulence closure model is utilized. Using a conserved scalar approach and assuming the form of probability density function to be a clipped Gaussian, the thermodynamic scalar variables are
Structure and mixing properties of combusting monopropellant sprays. AIAA Journal Vol. 27, No. 7 July Structure of the near-injector region of non-evaporating pressure-atomized sprays. Dispersed-phase structure of pressure-atomized sprays at various gas :// Structure of nonevaporating sprays. I - Initial conditions and mean properties Computation of turbulent evaporating sprays with well-specified measurements: a sensitivity study on droplet properties. Evaluation of an efficient statistical transport model for turbulentdroplet dispersion in dilute combusting :// evaporating sprays is reported. The major focus of the study is to advance the predictive capabilities for turbulent sprays and to present a detailed comparison of three vaporization models used to represent the transient heat transport within the droplet. The models considered are the thin-skin, infinite-diffusion, and diffusion-limit :// the structure of combusting HAN-based monopropellant sprays. Spray combustion was observed in combustion gas environ-ments near 5 MPa, using slide impaction to measure drop size, liquid mass flow rate, and liquid mass flux distributions. These measurements were used to evaluate separated-flow models of the process considering two limits ;.