Typical model design to measure aerodynamic coefficients in the presence of supersonic plume

K. Suresh; S. L.N. Desikan; M. M. Patil; P. G. Raveendran

doi:10.1177/0954410015573971

Typical model design to measure aerodynamic coefficients in the presence of supersonic plume

K. Suresh, S. L.N. Desikan, M. M. Patil, P. G. Raveendran

Indian Space Research Organization

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

A typical model design was carried out to study the effect of plume-freestream interaction on aerodynamic coefficients. Towards this, a blunt-cone-cylinder-flare model was designed and fabricated. A strain gauge balance was accommodated to measure forces and moments due to plume-freestream interaction. The criticality of the model design such as isolation of metric-non-metric parts and elimination of jet reaction force were addressed in this paper. A finite element analysis was carried out to ensure proper isolation of metric and non-metric parts. The results showed that the maximum deflection of the model under aerodynamic loads is 0.41‰mm, whereas the clearance between the metric and non-metric parts is 1.35‰mm. Also, the experiments under plume alone condition revealed that the aerodynamic coefficients (C_N, C_m and C_A) have negligible values of the order of 0.003, 0.008 and 0.009, respectively, which ascertain the isolation of metric-non-metric parts and jet reaction force. The numerical and experimental results showed that the model design is in order. Also, typical experiments were carried out at α‰=‰4° to study the plume-freestream interaction and the results show that as the jet pressure ratio (P_j/P_inf) increases, loss in C_N, C_m and C_A is observed.

Original language	English
Pages (from-to)	2297-2308
Number of pages	12
Journal	Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering
Volume	229
Issue number	12
DOIs	https://doi.org/10.1177/0954410015573971
Publication status	Published - 22 Oct 2015
Externally published	Yes

Keywords

Force measurement
hypersonic wind tunnel
jet interaction
supersonic plume

ASJC Scopus subject areas

Aerospace Engineering
Mechanical Engineering

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10.1177/0954410015573971

Cite this

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title = "Typical model design to measure aerodynamic coefficients in the presence of supersonic plume",

abstract = "A typical model design was carried out to study the effect of plume-freestream interaction on aerodynamic coefficients. Towards this, a blunt-cone-cylinder-flare model was designed and fabricated. A strain gauge balance was accommodated to measure forces and moments due to plume-freestream interaction. The criticality of the model design such as isolation of metric-non-metric parts and elimination of jet reaction force were addressed in this paper. A finite element analysis was carried out to ensure proper isolation of metric and non-metric parts. The results showed that the maximum deflection of the model under aerodynamic loads is 0.41‰mm, whereas the clearance between the metric and non-metric parts is 1.35‰mm. Also, the experiments under plume alone condition revealed that the aerodynamic coefficients (CN, Cm and CA) have negligible values of the order of 0.003, 0.008 and 0.009, respectively, which ascertain the isolation of metric-non-metric parts and jet reaction force. The numerical and experimental results showed that the model design is in order. Also, typical experiments were carried out at α‰=‰4° to study the plume-freestream interaction and the results show that as the jet pressure ratio (Pj/Pinf) increases, loss in CN, Cm and CA is observed.",

keywords = "Force measurement, hypersonic wind tunnel, jet interaction, supersonic plume",

author = "K. Suresh and Desikan, {S. L.N.} and Patil, {M. M.} and Raveendran, {P. G.}",

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AU - Suresh, K.

AU - Desikan, S. L.N.

AU - Patil, M. M.

AU - Raveendran, P. G.

N1 - Publisher Copyright: © Institution of Mechanical Engineers.

PY - 2015/10/22

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N2 - A typical model design was carried out to study the effect of plume-freestream interaction on aerodynamic coefficients. Towards this, a blunt-cone-cylinder-flare model was designed and fabricated. A strain gauge balance was accommodated to measure forces and moments due to plume-freestream interaction. The criticality of the model design such as isolation of metric-non-metric parts and elimination of jet reaction force were addressed in this paper. A finite element analysis was carried out to ensure proper isolation of metric and non-metric parts. The results showed that the maximum deflection of the model under aerodynamic loads is 0.41‰mm, whereas the clearance between the metric and non-metric parts is 1.35‰mm. Also, the experiments under plume alone condition revealed that the aerodynamic coefficients (CN, Cm and CA) have negligible values of the order of 0.003, 0.008 and 0.009, respectively, which ascertain the isolation of metric-non-metric parts and jet reaction force. The numerical and experimental results showed that the model design is in order. Also, typical experiments were carried out at α‰=‰4° to study the plume-freestream interaction and the results show that as the jet pressure ratio (Pj/Pinf) increases, loss in CN, Cm and CA is observed.

AB - A typical model design was carried out to study the effect of plume-freestream interaction on aerodynamic coefficients. Towards this, a blunt-cone-cylinder-flare model was designed and fabricated. A strain gauge balance was accommodated to measure forces and moments due to plume-freestream interaction. The criticality of the model design such as isolation of metric-non-metric parts and elimination of jet reaction force were addressed in this paper. A finite element analysis was carried out to ensure proper isolation of metric and non-metric parts. The results showed that the maximum deflection of the model under aerodynamic loads is 0.41‰mm, whereas the clearance between the metric and non-metric parts is 1.35‰mm. Also, the experiments under plume alone condition revealed that the aerodynamic coefficients (CN, Cm and CA) have negligible values of the order of 0.003, 0.008 and 0.009, respectively, which ascertain the isolation of metric-non-metric parts and jet reaction force. The numerical and experimental results showed that the model design is in order. Also, typical experiments were carried out at α‰=‰4° to study the plume-freestream interaction and the results show that as the jet pressure ratio (Pj/Pinf) increases, loss in CN, Cm and CA is observed.

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Typical model design to measure aerodynamic coefficients in the presence of supersonic plume

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