WorldCat Identities

Vaglio-Laurin, Roberto

Overview
Works: 30 works in 37 publications in 1 language and 46 library holdings
Roles: Author
Publication Timeline
.
Most widely held works by Roberto Vaglio-Laurin
Transonic rotational flow over a convex corner by Roberto Vaglio-Laurin( Book )

3 editions published in 1959 in English and held by 6 WorldCat member libraries worldwide

A singularity is encountered in the flow field about two-dimensional and axisymmetric bodies characterized by a sharp corner, where the fluid velocity becomes sonic. An investigation of this sonic singularity, and the application of results to the analysis of flow fields about blunt bodies are presented. It is shown that the problem belongs to the family of asymptotic or boundary layer phenomena of mathematical physics. The solution of the first approximation equations is given by a series in powers of a variable measuring the distance from the corner with coefficients depending on an appropriate similarity variable. The leading coefficient of the series is independent of three-dimensional and rotationality effects, in complete analogy to the well-known solution of the corner problem in supersonic flow. Results are presented for the leading singularity and for the first two corrections due to rotationality and axial symmetry of the flow. (Author)
On the PLK method and the supersonic blunt body problem by Roberto Vaglio-Laurin( Book )

2 editions published in 1960 in English and held by 3 WorldCat member libraries worldwide

On the structure of thermal layers near the air-sea interface by Roberto Vaglio-Laurin( )

2 editions published in 1973 in English and held by 3 WorldCat member libraries worldwide

Chemical effects in external hypersonic flows by Roberto Vaglio-Laurin( Book )

2 editions published in 1961 in English and held by 3 WorldCat member libraries worldwide

This paper gives an account of advances and problems in the area of chemically reacting continua. Emphasis is placed on the presentation of some recent results for external flows about axisymmetric hypersonic vehicles at zero incidence. Several facets of the problem are treated; in particular: The analysis and correlation of observables in complete inviscid flows assuming either chemical equilibrium or composition frozen at post-shock equilibrium conditions is presented. An assessment of behavior and effects of rate processes in these flows is performed by means of one-dimensional rate calculations along streamlines. On this basis it is shown that the latter calculations and the frozen model may be used in tandem to obtain reasonably accurate estimates of observables in practical situations. The behavior of non-equilibrium boundary layer flows over bodies is discussed with emphasis on the quenching effect of a cold non-catalytic wall. A quantitative study of wakes to be observed behind the vehicles in question is presented. In this connection the influence of shock induced vorticity and of inner core is considered for both laminar and turbulent flows; the ensuing effects are examined. Thus a rather complete picture is obtained of the flow pattern about the aforementioned configurations for flight conditions where local chemical equilibrium does not prevail
Turbulent heat transfer on blunt-nosed bodies in two-dimensional and general three-dimensional hypersonic flow by Roberto Vaglio-Laurin( Book )

1 edition published in 1958 in English and held by 2 WorldCat member libraries worldwide

A study of flow fields about some typical blunt-nosed slender bodies by Roberto Vaglio-Laurin( Book )

1 edition published in 1960 in English and held by 2 WorldCat member libraries worldwide

Analytical and numerical methods for hyperbolic conical flows by Roberto Vaglio-Laurin( Book )

1 edition published in 1955 in English and held by 2 WorldCat member libraries worldwide

Falling snow optical modeling( Book )

1 edition published in 1981 in English and held by 2 WorldCat member libraries worldwide

In order to develop a model describing the adverse weather effects of snow on optical transmission, it is necessary to incorporate optical, physical, and meteorological characteristics. We report on the development of a model which incorporates these three aspects of snow characterization. We first discuss a numerical model aimed at obtaining an understanding of the meteorological aspects of snowfall. Specifically, the model accepts as inputs such measurable quantities as temperature and dew point vertical profiles, as well as other quantities, often not measured, such as updraft velocity, cloud droplet size, and ice nucleus concentration. Based on these data, the model then predicts the time evolution of the cloud, and, eventually, the rate of precipitation and the type of snow particles arriving at the ground. We also discuss optical considerations in order to provide a framework in which physical and meteorological aspects can be included. Specifially, we discuss the need for areal, volume, and settling velocity parameters in calculating optical extinction coefficients. (Author)
Laminar heat transfer on blunt-nosed bodies in three-dimensional hypersonic flow by Roberto Vaglio-Laurin( Book )

1 edition published in 1958 in English and held by 2 WorldCat member libraries worldwide

Laminar heat transfer on blunt-nosed bodies in three-dimensional hypersonic flow by Roberto Vaglio-Laurin( Book )

1 edition published in 1958 in Undetermined and held by 2 WorldCat member libraries worldwide

Turbulent heat transfer on blunt-nosed bodies in two-dimensional and general three-dimensional hypersonic flow by Roberto Vaglio-Laurin( Book )

1 edition published in 1958 in English and held by 1 WorldCat member library worldwide

Asymptotic flow pattern of a hypersonic body( Book )

1 edition published in 1964 in English and held by 1 WorldCat member library worldwide

A theoretical investigation of the steady, continuum, inviscid flow pattern at large distances downstream of finite hypersonic bodies is presented. Specifically, blunt nosed plates and cylinders representative of actual bodies and associated wakes are considered. Asymptotic solutions are obtained for perfect gas flows at infinite Mach number. It is shown that: (a) the flows in question are not self-preserving (automodel); (b) asymptotic description thereof can be obtained by the method of matched expansions in conjunction with standard matching principles; (c) the asymptotic behavior of the bow shock is described by the law y=a sub ox(m) 1+a sub 1 x (N sub 1+ ... with the exponent m=2/(3+nu), in accord with the blast wave analogy, and the exponent N sub 1=-m(1+nu) (gamma-1)/gamma, gamma being the isentropic exponent of the gas. Considerations are qualitatively extended to the analysis of flows at large but finite Mach numbers; it is indicated that a general feature thereof is the appearance of secondary trailing shocks for both twodimensional and axisymmetric configurations. (Author)
Studies of Separated Flows( Book )

1 edition published in 1974 in English and held by 1 WorldCat member library worldwide

The report describes turbulent boundary layers in strong interaction with inviscid flows around transonic airfoils. These flows can be analyzed by the procedures developed for laminar problems, provided specific families of solutions are used to describe the boundary layer profiles in different regions, such as (a) the region upstream of the strong interaction, (b) the region between the beginning of the strong interaction and the point of reattachment, (c) the region downstream of the point of reattachment, and (d) the wake region. The main feature of the chosen solutions resides in their ability to introduce Reynolds number dependent boundary layer responses, as indicated in the available experiments. (Modified author abstract)
An approximate analysis of the continuum low density hypersonic flow of a chemically reacting and radiating gas over a blunt nosed body( Book )

1 edition published in 1964 in English and held by 1 WorldCat member library worldwide

The continuum low density hypersonic flow of a chemically reacting and radiating gas over a blunt body is analyzed by an approximate technique based on a recent alternative formulation of the well-known method of integral relations. Specifically, approximations are introduced for the streamwise variations of several flow properties, while detailed radial profiles, (consistent with the stipulated procedure) are sought by numerical analysis along normals to the body (essentially normals to streamlines); the particular formulation allows careful analysis of the large changes in physicochemical properties of the gas between body and shock, as are to be encountered at the low Reynolds numbers where viscous effects are important over the entire shock layer. Detailed derivations of the simplified system of ordinary differential equations and of the boundary conditions governing the problem is presented. An outline of numerical procedures for aplications is also given. (Author)
A note on the effect of centrifugal forces and accelerated motion on the instability of the laminar boundary layer about highly cooled bodies by Antonio Ferri( Book )

1 edition published in 1956 in English and held by 1 WorldCat member library worldwide

A Nonlinear Stability Approach to Boundary-Layer Transition Data Analysis( Book )

1 edition published in 1978 in English and held by 1 WorldCat member library worldwide

Findings and conclusions of a brief, seven month, effort on fundamental aspects of boundary-layer transition analysis and prediction are reported. Starting from the linear forced response/stability theories of Mack, the capabilities of the attendant maximum allowable linear disturbance amplitude criteria are examined in the context of selected transition experiments. Evidence of distinct nonlinear effects is found in the growth process of internal boundary-layer disturbances having small but finite amplitude heretofore assumed to fall within the realm of linear theory. The flow processes responsible for this behavior are identified, the formulation of an attendant nonlinear model differing from classical weakly nonlinear stability theory is set forth, and preliminary predictions, apparently explaining the complex multi-region stability diagram observed in recent experiments by Demetriades, are presented. An important role of nonlinear flow processes and models is suggested for transition data analyses/predictions and an approach to elaboration of such models is outlined. (Author)
Optical and fluid dynamic properties of explosion-produced dust clouds by John E Ebersole( Book )

1 edition published in 1980 in English and held by 1 WorldCat member library worldwide

Mixed-type conical flow without axial symmetry : summary of the recent work performed at P.I.B.A.L. by Antonio Ferri( Book )

1 edition published in 1954 in English and held by 1 WorldCat member library worldwide

Description of atmospheric turbulence for linear propagation of laser beams( Book )

1 edition published in 1970 in English and held by 1 WorldCat member library worldwide

The paper considers the fluid mechanical aspects and data relevant to the propagation of low power-density lasers in the atmospheric boundary layer. Its scope includes the following topics: (a) formulation of the role of the turbulent structure in determining phase and amplitude characteristics of received signals, with emphasis on single scattering situations, (b) review of available fluid mechanical data for mean and fluctuating flow properties for various atmospheric conditions, (c) identification of the atmospheric conditions that require complementary fluid mechanical measurements, and (d) problem areas that need further theoretical investigations concerning the effect of atmospheric turbulence on optical wave propagation. (Author)
Analysis and Modelling of the DIRT I and Graf II Battlefield Dust Obscuration Data( Book )

1 edition published in 1980 in English and held by 1 WorldCat member library worldwide

An analysis of photographic information is used to determine the source characteristics and the salient aspects of atmospheric diffusion for explosion-produced dust clouds. Specifically, the dependence of source strength (dust yield) upon the nature of the terrain and surface vegetative cover (sod) is identified. A partitioning of ejecta into essentially two distinct clouds, only one of which is buoyantly rising, is noted. Analytic solutions describing the diffusion of these two clouds taking into account the effects of vertical wind shear and gravitational settling are presented. Finally, experimental evidence indicative of large obscuration amplitude modulations is discussed and its association with effects due to large atmospheric eddies is suggested
 
moreShow More Titles
fewerShow Fewer Titles
Audience Level
0
Audience Level
1
  Kids General Special  
Audience level: 0.85 (from 0.51 for Mixed-type ... to 0.99 for An approxi ...)

Alternative Names
Laurin, Roberto Vaglio

Languages
English (24)