Thrust Characteristics of Through-type Pintle Nozzle at Operating Altitudes Conditions

Abstract

Numerical simulations have been performed to investigate thrust characteristics of a through-type pintle nozzle with or without flow separation at various operating altitudes. The low Reynolds number k-ε with compressibility correction proposed by Sarkar are applied. The detail flow structures are observed and static pressures along nozzle wall are compared with experimental results. The flow separation in the pintle nozzle disappears and jet plume strongly expands as its operating altitude increases. To evaluate the thrust characteristics, the momentum term and pressure term of thrust are analyzed. Thrust and thrust coefficient at altitude 20 km are about 10% more than them at the ground 0km.

Performance Analysis of the Pintle Thruster Using 1-D Simulation -I : Steady State Characteristics

“…국내에서는 핀틀-노즐이 적용된 고체추진기관의 지상연소시험을 수행하여 내탄도 성능해석과 비교를 국방과학연구소에서 수행하였다 [4]. 항공대에서는 관통형 핀틀 노즐의 핀틀 형상 및 핀틀 위치에 따른 추력계수 경향을 수치해석을 통해 분석하였고, 과팽창조건에서 발 생하는 박리유동이 추력에 미치는 영향을 확인하 였다 [5].…”