Additive erosion reduction influences in the turbulent boundary layer

Conference · Wed May 06 00:00:00 EDT 1981

OSTI ID:6419766

Buckingham, A C

Results of a sequence of flow, heat and mass transfer calculations are presented which theoretically characterize the erosive environment at the wall surface of refractory metal coated and uncoated gun barrels. The theoretical results include analysis of the wall surface temperature, heat flux, and shear stress time histories on thin (10 mil. or 0.254 mm) Cr, Mo, Nb, and Ta plated steel barrel walls as uncoated steel walls. The calculations combine effects of a number of separate processes which have been previously (and purposely) studied individually. These include solid particle additive concentrations, gas-wall thermo-chemical influences, and transient turbulent wall boundary layer flow with multi-component molecular diffusion and reactions from interaction of propellant combustion and the eroding surface. The boundary layer model includes particulate additive concentrations as well as propellant combustion products, considered for the present to be in the local thermochemical equilibrium.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6419766
• Report Number(s): UCRL-84957; CONF-810549-1
• Resource Relation: Conference: Jannaf propulsion meeting, New Orleans, LA, USA, 26 May 1981
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
REFRACTORY METALS
EROSION
BOUNDARY LAYERS
CHEMICAL REACTIONS
COMBUSTION
EXPLOSIVES
GUNS
HEAT TRANSFER
MATHEMATICAL MODELS
PROPELLANTS
PROTECTIVE COATINGS
TEMPERATURE GRADIENTS
THERMAL STRESSES
COATINGS
ELEMENTS
ENERGY TRANSFER
LAYERS
METALS
OXIDATION
STRESSES
THERMOCHEMICAL PROCESSES
360105* - Metals & Alloys- Corrosion & Erosion