A simple analytical model for parametric studies of hypersonic waveriders

1998 ◽  
Author(s):  
Ryan Starkey ◽  
Mark Lewis
Keyword(s):  
Analytical Model ◽  
Simple Analytical Model ◽  
Parametric Studies

Analysis and Computation of Energy Loss in Radial Tires

1984 ◽  
Vol 12 (1) ◽  
pp. 3-22 ◽  
Author(s):  
M. K. Chakko
Keyword(s):  
Structural Analysis ◽  
Energy Loss ◽  
Computer Program ◽  
Analytical Model ◽  
Material Properties ◽  
Rolling Resistance ◽  
Basic Material ◽  
Simple Analytical Model ◽  
Automobile Tire ◽  
Parametric Studies

Abstract A comprehensive but simple analytical model for predicting the energy loss in radial tires is presented. Using approximate structural analysis, the model relates the basic material properties and construction variables of the tire to its energy loss or rolling resistance. The formulas developed were computer-programmed, and the tire rolling resistance and its distribution among the components of a typical radial automobile tire were computed. The significant contributions to rolling resistance were from tread compression, carcass cord extension and bending, and sidewall rubber bending. Parametric studies using the computer program were carried out to obtain the trends in rolling resistance due to changes in several tire material properties and construction variables. The computations also showed the existence of locally optimum values for the tread modulus, carcass cord modulus, and carcass cord end count which minimize the tire rolling resistance.

Convective Losses From Cavity Solar Receivers—Comparisons Between Analytical Predictions and Experimental Results

1983 ◽  
Vol 105 (1) ◽  
pp. 29-33 ◽  
Author(s):  
A. M. Clausing
Keyword(s):  
Experimental Data ◽  
Experimental Evidence ◽  
Analytical Model ◽  
Excellent Agreement ◽  
Experimental Results ◽  
Simple Analytical Model ◽  
Refined Model ◽  
Wall Area

Cavity solar receivers are generally believed to have higher thermal efficiencies than external receivers due to reduced losses. A simple analytical model was presented by the author which indicated that the ability to heat the air inside the cavity often controls the convective loss from cavity receivers. Thus, if the receiver contains a large amount of inactive hot wall area, it can experience a large convective loss. Excellent experimental data from a variety of cavity configurations and orientations have recently become available. These data provided a means of testing and refining the analytical model. In this manuscript, a brief description of the refined model is presented. Emphasis is placed on using available experimental evidence to substantiate the hypothesized mechanisms and assumptions. Detailed comparisons are given between analytical predictions and experimental results. Excellent agreement is obtained, and the important mechanisms are more clearly delineated.

Crypto-steady supersonic pressure exchange: A simple analytical model

2008 ◽  
Vol 85 (4) ◽  
pp. 228-242 ◽  
Author(s):  
Hongfang Zhang ◽  
Charles A. Garris
Keyword(s):  
Analytical Model ◽  
Simple Analytical Model ◽  
Pressure Exchange

Shear transfer strength of uncracked interfaces: A simple analytical model

2018 ◽  
Vol 192 ◽  
pp. 366-380 ◽  
Author(s):  
Subhan Ahmad ◽  
Pradeep Bhargava ◽  
Ajay Chourasia
Keyword(s):  
Analytical Model ◽  
Simple Analytical Model ◽  
Shear Transfer

scholarly journals CONTRACTING-OUT OF HOUSEHOLD WASTE COLLECTION SERVICES IN JAPAN

2017 ◽  
Vol 65 (02) ◽  
pp. 443-455
Author(s):  
NORIMICHI MATSUEDA ◽  
JUN’ICHI MIKI
Keyword(s):  
Analytical Model ◽  
Inverse Relationship ◽  
Municipal Waste ◽  
Household Waste ◽  
Private Firms ◽  
Simple Analytical Model ◽  
Waste Collection ◽  
Contracting Out ◽  
Contract Price ◽  
Set Up

We first report three empirical findings from our survey on the contracting-out of municipal waste collection services in Japan: (1) the rate of contracting-out and the contract price are inversely related, (2) this inverse relationship tapers out as the contracting rate becomes sufficiently high, and the contract price even tends to go up as the contracting rate approaches 100% and (3) there is a significant disparity in the contracting rates between the eastern and western parts of Japan. In order to account for these observations, we then set up a simple analytical model and examine its implications. Also, we discuss the issues that a potential hold-up situation could give rise to when the services are completely contracted out to private firms.

scholarly journals Design of thin film solar cells based on a unified simple analytical model

2017 ◽  
Vol 15 (6) ◽  
pp. 599-608 ◽  
Author(s):  
Armando Acevedo-Luna ◽  
Roberto Bernal-Correa ◽  
Jorge Montes-Monsalve ◽  
Arturo Morales-Acevedo
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Analytical Model ◽  
Thin Film Solar Cells ◽  
Simple Analytical Model

Adhesion of Wax Droplets to Porous Substrates

2012 ◽  
Author(s):  
Shima Dadvar ◽  
Sanjeev Chandra ◽  
Nasser Ashgriz ◽  
Stephan Drappel
Keyword(s):  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Impact Velocity ◽  
Analytical Model ◽  
Contact Area ◽  
Initial Temperature ◽  
Simple Analytical Model ◽  
Porous Polyethylene ◽  
Porous Surfaces ◽  
Strength Of Adhesion

The adhesion of solid wax ink droplets to porous polyethylene and Teflon substrates was studied experimentally. Wax droplets with a diameter of 3 mm and an initial temperature of 110°C were dropped onto test surfaces from heights varying from 20–50 mm. The Teflon surfaces had holes drilled in them to create idealized porous surfaces while the porous polyethylene sheets had mean pore sizes of either 35 or 70 μm. The force required to remove the wax splats from the substrates was measured by a pull test. The detachment force increased with droplet impact velocity. A simple analytical model is proposed to predict the force attaching the wax splat to the surface: it has an adhesive component, calculated by multiplying the contact area between the splat and substrate by the strength of adhesion; and a cohesive component, calculated by multiplying the area of the pores into which wax penetrates by the ultimate tensile strength of wax. Predictions from the model agreed reasonably well with measurements.

Sign in / Sign up

Export Citation Format

Share Document