Estimation of Flow Properties of Gelled Fuels with Regard to Propulsion Systems

被引：21

作者：

Madlener, Klaus ^{[1
]}

Ciezki, Helmut K. ^{[1
]}

机构：

[1] German Aerosp Ctr, DLR, Propellants Dept, Inst Space Prop, D-74239 Hardthausen, Germany

来源：

JOURNAL OF PROPULSION AND POWER | 2012年 / 28卷 / 01期

关键词：

LAMINAR-TURBULENT TRANSITION; NON-NEWTONIAN FLUIDS; PIPE-FLOW; HEAT;

D O I：

10.2514/1.50422

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

Gelled fuels and propellants are shear-thinning non-Newtonian fluids. Their dependency of the shear viscosity from the shear rate can be described with sufficient accuracy by an extended version of the Herschel-Bulkley equation in the whole rocket and ramjet propulsion-relevant shear-rate range. Additionally to the analytically determined generalized Reynolds number for fluids, which follow the extended Herschel-Bulkley equation, a method for the estimation of critical Reynolds numbers (as a phenomenological approach) is presented. Both dimensionless numbers are useful for the characterization of the flow and partially also of the spray processes of gel fluids. The results show furthermore that both the shear-thinning property and the yield stress tend to stabilize the laminar flow and thus shift the critical Reynolds number to higher values when compared to Newtonian liquids.

引用

页码：113 / 121

页数：9

共 39 条

[1]

Almdal K., 1993, POLYM GELS NETW, V1, P5

[2]

[Anonymous], 17 INT S AIRBR ENG I

[3]

Bartels N., 2005, NOV EN MAT P 9 INT W, P39

[4]

Ciezki H. K., 2004, S EN CONV FUND AIR F

[5]

Ciezki H. K., 2002, P 33 INT ANN C ICT F

[6]

Desyatkov A., 2008, 44 AIAA JOINT PROP C

[7] TURBULENT FLOW OF NON-NEWTONIAN SYSTEMS [J].

DODGE, DW ;

METZNER, AB .

AICHE JOURNAL, 1959, 5 (02) :189-204

[8] Laminar-turbulent transition in pipe flow for Newtonian and non-Newtonian fluids [J].

Draad, AA ;

Kuiken, GDC ;

Nieuwstadt, FTM .

JOURNAL OF FLUID MECHANICS, 1998, 377 :267-312

[9]

Fakhri S, 2009, 45 AIAA JOINT PROP C

[10] Predicting laminar-turbulent transition in Poiseuille pipe flow for non-Newtonian fluids [J].

Guzel, B. ;

Frigaard, I. ;

Martinez, D. M. .

CHEMICAL ENGINEERING SCIENCE, 2009, 64 (02) :254-264

← 1 2 3 4 →