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Papers of Arthur Leonard Roberts, 1913-1962
RoFam/4/5 Correspondence between the RIBA Library and Messrs. Shenton, Pitt, Walsh and Moss, solicitors, executors of A. L. Roberts, concerning gifts of 'various books and papers to the Librarian' [of the RIBA], December 1968.
Spitfire Armourer
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Catalogue #1
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Mass Transfer Cooling Near the Stagnation Point
A simplified analysis is made of mass transfer cooling--that is, injection of a foreign gas--near the stagnation point for two-dimensional and axisymmetric bodies. The reduction in heat transfer is given in terms of the properties of the coolant gas and it is shown that the heat transfer may be reduced considerably by the introduction of a gas having appropriate thermal and diffusive properties. The mechanism by which heat transfer is reduced is discussed.
Stagnation-point Shielding by Melting and Vaporization
An approximate theoretical analysis is made of the shielding mechanism whereby the rate of heat transfer to the forward stagnation point of blunt bodies is reduced by melting and vaporization. General qualitative results are given and a numerical example, the melting and vaporization of ice, is presented and discussed in detail.
A Theoretical Study of Stagnation-point Ablation
A simplified analysis is made of ablation cooling near the stagnation point of a two-dimensional or axisymmetric body which occurs as the body vaporizes directly from the solid state. The automatic shielding mechanism is discussed and the important thermal properties required by a good ablation material are given. The results of the analysis are given in terms of dimensionless parameters.
