ESDU A-Z Index: O-OZ

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Oblique Shock Waves
see
Shock Waves
Octave
Band Limits, 17002
Bandwidth, 17002
Centre Frequency
approximate, 17002
exact, 17002
Definition, 17002, 66013
Offset Swinging-block Mechanisms
see
Slider-crank Mechanisms
Ogive Cylinders
see also
Base Drag (without Blowing or Jet Efflux)
Boat-tailing
Bodies of Revolution
Boundary Layer
Equilibrium Surface Temperature
Flow Separation
Skin Friction Drag
Centre of Pressure and Pitching Moment With or Without Nose Blunting
applicability of method of estimation for any smoothly-curved forebody, 89014
incidences to 90? and Mach numbers to 5, 89014, 90034
Lift Distribution and Pitching Moment
oscillating in bending, heave or pitch, 83010
Normal-Force-Curve Slope
applicability of method of estimation for any smoothly-curved forebody, 89008
zero incidence and Mach numbers to 5, 89008
Normal Force With or Without Nose Blunting
applicability of method of estimation for any smoothly-curved forebody, 89014
incidences to 90 degrees and Mach numbers to 5, 89014, 90034
Pitching-Moment-Curve Slope
zero incidence and Mach numbers to 5, 89008
Pitching Moment Derivatives Due to Rate of Pitch and Acceleration in Heave
low incidence and supersonic speeds, with or without boat-tailing and fins, 91004
Planform Areas and Their Centroids, 77028
Sideforce at Mach Numbers Below 1.2 and Incidences Above 20?
discussion of sources (applicable to any smoothy-curved forebody), 89014
effect of Mach number and Reynolds number, 89014
effect of nose blunting, 89014
envelope of overall maximum with crossflow Mach number, 89014
typical axial distributions, 89014
Surface Areas, Volumes and Nose Angles or Radii of Curvature, 77028
Ogives
see also
Forebody
Ogive Cylinders
With or Without Truncation or Nose Blunting
planform area and its centroid, 77028
surface area and volume, nose angle or radius of curvature, 77028
Oil Fuels
see
Fuel Oils
Oils
see
Fouling in Crude Oil Distillation Plant
Lubricants
Olive Oil
Dynamic and Kinematic Viscosity
temperature variation in liquid state, 66024
One-dimensional Flow
see also
Ejectors
Adiabatic
definition, 74029, AERO S.00.03.06
Adiabatic or Isothermal Compressible in Straight Ducts
approximation of real conditions, 74029
effect of friction on choking conditions, 74029
equations for, 74029
solution of, 74029
Air in Dissociation Equilibrium
solution using Mollier chart, AERO S.00.03.27
Analysis Applied to Estimation of Engine Forces
internal drag, 81009
pre-entry drag (force), 81004, 84004
thrust, 67035, 69008
Applicability to Real Flow, 74029
Choking Conditions
area ratio in isentropic, 67035, 74028, AERO S.00.03.06
effect of friction in adiabatic or isothermal, 74029
entry Mach number to duct, 81004
mass flow parameters in isentropic, 67035, 69008, 81004, FMI1
mass flow ratio (freestream/duct inlet), 81004
pressure ratio in isentropic, 67035, 69008, 74028
temperature ratio in isentropic, 74028
Forces Due to, 67035, 69008, 81004, 81009
Generalised Compressible Flow Equations, FMI1
Isentropic
approximation of real conditions, 74028
basic thermodynamic properties, AERO S.00.03.06
calorically imperfect diatomic gas, AERO S.00.01.10
perfect air, 69026, 74028, AERO 00.03.05
perfect gas, 67035, 69008, 74028, 81004, 97017, AERO S.00.03.06, AERO S.00.03.07, FMI1
real air, 73017
Jet Flow Parameters, 67035, 69008
Mass Flow Functions
variation with Mach number and specific heat capacity, 74028, 81004
variation with pressure ratio and specific heat capacity, 67035, 69008, FMI1
Moments Due to, 81004
Momentum Function
variation with Mach number and specific heat capacity, 81004
variation with pressure ratio and specific heat capacity, 67035, 69008
Stagnation Conditions as Function of Mach Number
calorically imperfect diatomic gas, AERO S.00.01.10
perfect air, 69026, 74028, AERO 00.03.05
perfect gas, 74028, AERO S.00.03.06, AERO S.00.03.07
real air, 73017
Steady, Spatially Non-Uniform Axial Compressible Using Thermodynamically-Rigorous Approach
application to components in series, 95011, 97029
calorically-perfect gas, 95011
thermally-perfect gas, 97029
Thrust, 67035, 69008, 81004
One-Third Octave
Band Limits, 17002
Bandwidth, 17002
Centre Frequency
approximate, 17002
exact, 17002
Definition, 17002
Open-jet Wind Tunnels
see
Wind-tunnel Corrections for Aerofoils
Optimisation
see also
Aerofoils
Flight Path Optimisation
Optimum Design
Definitions of Terms Used, 99019
Discussion of Various Methods and Their Advantages and Limitations, 99019
Explanation of Principal Features of Programs, 99019
Factors to Consider in Wing/Winglet Design, 98013
analysis of Boeing and Douglas wing modification studies, 98013
Use of Mutivariate Gradient Search Techniques, 94012, 99019
consideration of design surface features and effect on in locating global minimum, 99019
effect of tolerance on success in locating global minimum, 99019
Optimum Design
see
Aerofoils
Annular Diffusers
Conical Diffusers
Ejectors
Flat Panels with Unflanged Integral Stiffeners
Flat Sandwich Panels (Cores of Negligible Flexural Stiffness)
Forebody
Helical Springs of Round Wire
Laminated Construction Using Composites
Optimum Wave Drag
Plane-walled Diffusers with Single-plane Expansion
Shell-and-tube Heat Exchangers
Struts of I-section
Struts of Tubular Section
Optimum Wave Drag
Area Distribution in Transonic Flow for, AERO A.02.03.02
theoretical drag rise at zero lift, AERO A.02.03.02
Orifices
Cylindrical Tube
discharge coefficients and mass flow at choking, 82009
pressure drop in compressible flow, 82009
pressure drop in incompressible flow, 81039, 82009
Plate
discharge coefficients and mass flow at choking, 82009
pressure drop in single-phase compressible flow, 82009
pressure drop in single-phase incompressible flow, 66030, 81039, 82009, 89012
pressure drop in two-phase gas- or vapour-liquid flow, 89012
O-ring Seals
see
Reciprocating Seals
Orthotropic Beams, Plates and Strips
see
Beams of Sandwich Construction
Corner Section in Specially-orthotropic Plates
Curved Sandwich Panels (Cores of Negligible Flexural Stiffness)
Curved Specially-orthotropic Rectangular Plates
Curved Unbalanced Laminated Rectangular Plates
Faceplate Wrinkling
Flat Panels with Fibre-reinforced Unflanged Integral Stiffeners
Flat Sandwich Panels (Cores of Negligible Flexural Stiffness)
Flat Sandwich Panels (Corrugated Cores)
Flat Sandwich Panels (Truss Cores)
Flat Specially-orthotropic Rectangular Plates
Flat Specially-orthotropic Square Plates
Flat Strips of Orthotropic Materials
Flat Unbalanced Laminated Rectangular Plates
Laminated Construction Using Composites
Response of Lightweight Structures
Sandwich Panels and Plates
Struts of Sandwich Construction
Overall Gross/net Thrust
Turbo-Jet Engines
see also
Thrust of Turbo-fan and Turbo-jet Engines
definition, 69006
Overturning Moment on Surface-mounted Structures
Boundary Walls, Fences or Hoardings (Including Elevated Panel)
flows with turbulence and shear normal or at incidence to wall, 89050
mean and peak values, 89050
prediction for finite straight wall, individual panel in long wall or corner panel, 89050
Circular-Section Cylinders (Parallel-Sided, Stepped or Tapered)
effect of isolated protuberances including helical strakes, 81017
local or overall, 81017
Double-Wedge Section Cylinders With Edge Aligned Symmetrically and Normal to Flow
with or without rounded edges in turbulent shear flow, 79026
Elliptical-Section Cylinder Normal to Flow
turbulent shear flow, 79026
Frameworks of Flat-Sided and/or Tubular Members
effects of gusset plates and ancillary components, 81027
effects of incidence and yaw, turbulence and velocity profile, 81027
effect sof roughness, taper and solidity, 81027
Lattice Towers of Flat-Sided and/or Tubular Members
effects of gusset plates and ancillary components, 81028
effects of incidence, turbulence and velocity profile, 81028
effects of roughness and solidity, 81028
Multi-Sided Circular-Section Cylinder With Edge Aligned Symmetrically and Normal to Flow
with or without rounded edges in turbulent shear flow, 79026
Multi-Sided Elliptical-Section Cylinder With Edge Aligned Symmetrically and Normal to Flow
with or without rounded edges in turbulent shear flow, 79026
Rectangular- or Square-Section Cylinders Normal to Flow
effects of incidence and turbulence in shear flow, 80003
with or without rounded edges in turbulent shear flow, 80003
Rectangular- or Square-Section Cylinders With Face Normal to Flow
uniform approach flow, 71016
Triangular-Section Cylinders With Edge Aligned Symmetrically and Normal to Flow
with or without rounded edges in turbulent shear flow, 79026
Triangular-Section Cylinders With Face Normal to Flow
with or without rounded edges in turbulent shear flow, 79026
Oxygen
Gas Constant, AERO 00.01.09
Ozone
In Atmosphere
effect on solar irradiance, 69015

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