Description / Abstract:
This document is offered to provide state-of-the-art information
about design factors that must be considered in the design of new
or significantly modified engine test cells used to test propeller
equipped turboprop engines in either QEC or bare engine
configurations. The report does not address design considerations
for test cells designed to test turboprop engines with dynamometer
type load absorption devices because they are essentially tested as
turboshaft engines. Design considerations for those test cells are
presented in AIR4989, Reference 2.1.
Purpose
a. Provide guidelines for factors that must be considered to
design state-of-the-art enclosed engine test cells used to test
propeller equipped turboprop engines.
b. Provide empirical data/information about aerodynamic
characteristics of propeller equipped engine testing in enclosed
test cells.
c. Provide empirical acoustic data/information from propeller
equipped engine test operations in enclosed test cells.