V Gutter Flame Holder

Flame was more stable than the flame possessing a wake instability.

V gutter flame holder.

Damk ohler number in a v gutter stabilized flame. Gas turbine augmentors employ bluff body flame holders to anchor and stabilize the flame. The new novel flame holder concept clearly demonstrated an improved lo lbo performance pver the conventional v gutter flame holder. The corresponding combustor design could be guided by the above results.

A flame holder creates a low speed eddy in the engine to prevent the flame from being blown out. Even more effective however is the v gutter flame holder which is shaped like a v with the point in the direction facing the flow of air. In this paper a. Fourier analysis principal component analysis pca and wavelet analysis wa.

This paper therefore describes a case study to compare the characterization of combustion dynamics behind a v gutter flame holder using three mathematical methods. In fluid dynamics an eddy is the swirling of a fluid and the reverse current created when the fluid is in a turbulent flow regime. The design of the flame holder is an issue of balance between a stable eddy and drag. Some studies have suggested that adding a small amount of base bleed to a v gutter helps reduce drag without reducing effectiveness.

Flame transfer function 1. Even more effective however is the v gutter flame holder which is shaped like a v with the point in the direction facing the flow of air. A novel multi lobe flame holder design concept was designed fabricated and tested under high vitiated air flow temperature conditions for light off lo and lean blow out lbo performance. All these experimental and computational studies have contributed to the understanding of bluff body supported flame stabilization.

To avoid potential auto ignition due to high inlet air temperatures modern augmentors employ close coupled fuel injector flame holder designs. Legacy augmentors have utilized spray bars spray rings and v gutter flame holders. The edges of the v gutter which are smooth in the regular case are sh. From the dynamic stability point of view most of the previous research on thermo acoustic instability focuses on the bluff body v gutter and backward facing step flame holders.

The comparison focuses on the analysis of the characteristic frequencies of flow flame interactions. In this paper the numerical study of cold flow over two types of regular and wavy v gutter flame holders has been presented.