## 6.1. Transient Blade Row Modeling Terminology

The following terminology applies in the context of Transient Blade Row modeling:

- Turbo Component - is the sector of blades in a given blade row that are being modeled in the analysis. Transient Rotor-stator analyses involve at least two components, one rotating and one stationary component.

- Blade Flutter - used here to describe the one-way coupling between a prescribed blade motion and the effect it has on its surrounding fluid (more properly referred to as forced response).

- Conventional Periodicity - are periodic boundaries with no special time lag for phase-shift treatment. In such cases, the rotating and stationary components are not necessarily periodic to each other at different instances of time.

- Reference Solution (or Full-domain modeling) - refers to solving a transient blade row problem using an ensemble of blade passages where the pitch ratio is one.

- Transient Blade Row methods - are the CFX Transient Blade Row methods:

  - Fourier Transformation method

  - Time Transformation method

  - Profile Transformation method

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