Browsing by Author "Smith, A. G."
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Item Open Access An experimental method of determining the mean heat transfer coefficient for the nozzle of a solid propellant rocket engine, by means of constant flow calorimetry(College of Aeronautics, 1962-01) Smith, A. G.An investigation has been made into the feasibility of predicting mean convective heat transfer coefficients for the nozzles of solid propellant rocket engines. The principle of the method used was constant flow calorimetry; the surface of a copper nozzle was heated with a flow of hot water, and cooled by air flow through the nozzle. Heat transfer coefficients were then derived from measurements of water flow, water temperature drop and nozzle surface temperatures. For a range of Reynolds numbers, the mean convective heat transfer for a star-shaped conduit could be expressed by the following equation: - Nu = 0.1976 Re 0.631 Pr 0.333 For a cigarette-burning charge the mean convective heat transfer could be expressed by the following equation : - = 0.7013 Re 0.491 Pr 0.333 The flow pattern into the nozzle was studied using a water flow visualisation rig involving both photographic and direct viewing techniques. In addition, investigations into the temperature and pressure distributions along the nozzle surface at ambient conditions were carried out using a perspex nozzle fitted with surface thermocouples and pressure tappings.Item Open Access 'Heat transfer at low temperature in the entry section of a solid propellant rocket nozzle'(College of Aeronautics, 1962-04) Smith, A. G.Heat transfer in the converging section of the nozzle of a simulated solid propellant rocket with a star-shaped conduit has been investigated in the following way: (a) Area-average heat transfer has been measured on a room temperature rig, with and without a simulated charge. (b) Theoretical heat transfer has been calculated without the charge (axisymmetric laminar flow). (0) An attempt has been made to predict the detailed distribution of heat transfer by measurements of mass transfer on a nozzle made of napthalene. (d) Flow visualisation has been performed on a water-rig … [cont.].Item Open Access Study of heat and mass transfer from non-isothermal surfaces(College of Aeronautics, 1962-11) Smith, A. G.N/A