Effects of geometry on brush seal pressure and flow fields - Part II: Backing plate configurations
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Tarih
2006
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Asme-Amer Soc Mechanical Eng
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Brush seal dynamic behavior is strongly related to pressure and flow fields. Developments in brush seal design have led to geometric modifications to control flow; field and consequent brush seal issues including blow-down. hang-up, and pressure stiffening. Some of the geometric enhancements have been found to have common use as backing plate modifications. Over the two decades of brush seal evolution, many backing plate configurations have been suggested in numerous parent disclosures. Even so, literature on the effects of geometric modifications oil pressure and flow fields remains limited. This study numerically investigates brush seal pressure and flow fields for such common conceptual backing plate configurations as single and multiple grooves, with and without by-pass passages. The CFD analysis presented employs a bulk porous medium approach for the bristle pack. The effectiveness of various backing plate configurations outlining important flow features is discussed. Results indicate that backing plate configurations have a decisive role in shaping seal pressure fields. In general, it has been found that all cases having bypass configuration leak more. Moreover the major portion of the seal leakage through fence height is fed front the backing plate cavity. The single backing plate groove forms a constant pressure behind the bristle pack. In contrast, multiple grooves form multiple constant pressure regions.
Açıklama
Dogu, Yahya/0000-0003-0474-2899
Anahtar Kelimeler
Kaynak
Journal Of Turbomachinery-Transactions Of The Asme
WoS Q Değeri
Q3
Scopus Q Değeri
Q2
Cilt
128
Sayı
2
Künye
closedAccess
