Abstract
This paper focuses on a sensor, which provides information of shock propagating in flow field such as its strength and direction. The diaphragm of sensitive head of pressure transducer, on which a semi-conductor type strain gauge is glued, is analyzed using FEM and the relation is discussed between behavior of the diaphragm over which the shock passes and the direction in which the shock propagates. The numerical analysis offers the strain distribution of surface of the diaphragm depends on the shock direction and the direction of maximum principal strain of the diaphragm conesponds to the direction in which the shock propagates or its perpendicular direction. Experimentally, strains of the diaphragm in different directions are obtained and the direction of maximum principal strain is estimated using Rosette analysis, being compared with the shock direction. As a result, the shock direction was found to be estimated to some degree of accuracy due to the Rosette analysis using a scheme proposed in the present paper.
