Large asymmetric nozzle flow separation side forces have been observed during staging of some operational missiles. Because of the proposed use of extendible exit cones in advanced launch vehicles, the available staging clearances are small. Therefore, a need exists for a reliable nozzle side force prediction methodology during the missile design phase. Existing methodologies rely on unobstructed nozzle test data, which could be deficient for staging analysis due to nozzle blockage by the lower-stage dome. This paper presents an empirical procedure that takes nozzle blockage into account. Predicted results are compared with flight (Minuteman I/II and II/III staging) and subscale test (Trident I/II staging) side force data with reasonably good agreement.
Nomenclature
C4= Trident (C4) missile F N = thrust at nozzle throat F s = nozzle side force P a = external pressure in vicinity of nozzle exit plane a = nozzle half-angle
In addition two subcontractors provided support relating to building configurations, energy demand, building codes and conventional total energy systems. They were the Envirodyne Energy Services and The Energy Group, a subsidiary of Welton-Becket Associates. The DOE (Washington D.C.
In addition two subcontractors provided support relating to building configurations, energy demand, building codes and conventional total energy systems. They
In addition two subcontractors provided support relating to building configurations, energy demand, building codes and conventional total energy systems. They were the Envirodyne Energy Services and The Energy Group, a subsidiary of Welton-Becket Associates. The DOE (Washington D.C.) Program Manager was Mr. J. E. Rannels. Technical'
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