Experimental Determination of the Transport Properties of Gases. Part Ii. Heat Transfer and Ultrasonic Measurements PDF Download

Author: Charles A. Carey
Publisher:
ISBN:
Category :
Languages : en
Pages : 96

Get Book Here

Book Description
Methods of experimentally determining the transport properties of high temperature gases have been developed and measurements of viscosity, thermal conducitvity, and diffusion coefficients obtained. The heat transfer rate through laminar boundary layers, the absorption of sound, and a schlieren method have been investigated for the determination of transport properties. Heat transfer measurements on the side wall of the shock tube have been used to obtain viscosities of argon, oxygen, nitrogen, and carbon dioxide up to 4000 K. The boundary layer equations were solved for side wall boundary layers in the shock tube in oxygen to assess the relative importance of viscosity and thermal conductivity in heat transfer to the side wall. Thermal conductivities were deduced from end wall heat transfer measurements in carbon dioxide up to 2000 K and oxygen up to 4000 K. End wall heat transfer measurements in nitrogen and argon have been compared to theory with excellent agreement. Various methods for measuring ultrasonic absorption are discussed. The viscosity of argon at temperatures up to 8000 K were determined with the ultrasonic method. Diffusion coefficient in 50-50 He-Ar mixtures have also been obtained from the ultrasonic measurements at room temperature with excellent agreement with other investigators. The theory of a schlieren method for the measurement of thermal conductivity using the end wall boundary layer in the shock tube is discussed. (Author).