The ultimate objective of the proposed work is to provide the government with proven miniature pressure instrumentation for measure dusty flow boundary layers in small-scale windtunnel, and shock tube tests. Small probes are needed for making measurements near the wall or dust bed. Phase I will evaluate the technical capabilities of existing small sensors for use in snob/greg probes and will investigate the feasibility of miniaturizing LDV probes. It will produce a design for a miniature snob/greg probe system, using the smallest reliable sensors available, and a preliminary design for a small LDV probe. A prototype greg probe will be developed in Phase I. A preliminary design of a rake to accommodate the small snob/greg. LDV probes with be completed. Successful output of Phase I will fully support standardized hardware development in Phase II. The goal will be to develop sensors and a rake capable of accurately measuring the dusty flow for subscale tests as low a 1/100 scale (based on 1-mt burst). Successful completion of Phase II will provide the government with a new capability to test at small, cost-effective scales, and to study dust particle size scaling phenomena. It also will support basic studies of turbulent dusty flows needed for hydrocode development and evaluation.
