Design of Sub-scale Rocket-Ramjet Combined Cycle E...

Kanda, Takeshi; Tomioka, Sadatake; Ueda, Shuichi; Tani, Kazuo; Wakamatsu, Yoshio

doi:10.2514/6.iac-05-c4.5.03

Cited by 13 publications

(7 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The flowpath design philosophy from Refs. [2,14] is summarized here in brief, followed by a detailed description of the fabrication of the subscale model as it was required to compromise some design parameters due to fabrication limitations for the reduced-scale model.…”

Section: Engine Modelmentioning

confidence: 99%

“…Geometrical contraction ratio of about 5 for the external compression-type inlet was also from our scramjet experience [15] as well as the component tests (summarized in Ref. [14]) for both good starting capability and sufficient compression. To ensure starting capability at a lower Mach number of 3.4 [16], a drooped leading edge for the cowl was adopted.…”

Section: A Engine Design Philosophy and Technical Challengesmentioning

confidence: 99%

“…[2] by our research group, a rocket-ramjet combined cycle engine model was designed [14] based on scramjet engine experiences [15] and was tested in the 2000s at a wind tunnel facility [16] simulating the sealevel condition. This engine model equipped all flowpath components as inlet, rocket chamber, mixing duct for airflow-rocket plume mixing (momentum transfer) and secondary choking, diverging ramjet duct for thrust production, and secondary injector to attain ramjet-mode operation.…”

mentioning

confidence: 99%

“…In the present Paper, the subscale engine model (proposed in Refs. [2,14]) was tested at sea-level static environment to check the design philosophy. Available design parameters related to ejector-mode operation, to be addressed in next section, were also tested, and the results are described.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Sea-Level Static Tests of Rocket–Ramjet Combined Cycle Engine Model

Tomioka

Takegoshi

Kochi

et al. 2021

Journal of Propulsion and Power

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Engine Modelmentioning

confidence: 99%

Section: A Engine Design Philosophy and Technical Challengesmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Sea-Level Static Tests of Rocket–Ramjet Combined Cycle Engine Model

Tomioka

Takegoshi

Kochi

et al. 2021

Journal of Propulsion and Power

Self Cite

View full text Add to dashboard Cite

show abstract

“…At the JAXA Kakuda Space Propulsion Center, rocket-base combined cycle engines (RBCC) have been studied since the turn of the century. 1) Since all space transporters have to accelerate from zero to orbital speed, the engine has to operate in a wide range of flight speeds. The rocket can inherently achieve this requirement but with limited eIsp.…”

Section: Introductionmentioning

confidence: 99%

Analytical Method for Prediction of Suction Performance of Ejector-Jet

Tani

Hasegawa

Ueda

et al. 2015

Trans. Japan Soc. Aero. S Sci.

Self Cite

View full text Add to dashboard Cite

To reduce the cost of space transportation, air-breathing engines are considered to be candidates for propulsion. However, to cover a wide range of flight speeds, the propulsion system has to operate in various modes to be efficient under incoming atmospheric-air conditions. The Japan Aerospace Exploration Agency is proposing a rocket-based combined cycle engine for operation under various condition, an ejector-jet mode being adopted for the low-speed regime. The suction performance ejector-jets has long been studied experimentally and numerically at JAXA, and little success has been achieved in explaining the deterioration of suction performance with high-temperature gas or light gas such as helium. In the present study, based on former models, a simple one-dimensional model was introduced incorporating the mixing effects of the primary flow (rocket flow) and secondary flow (induced air flow). The results were compared using several experimental and numerical data to check the plausibility of the model. It was found that if greater mixing occurs, suction performance is degraded, explaining the actual phenomena of the experiments.

show abstract

Combined‐Cycle Engines

Kanda

2010

Encyclopedia of Aerospace Engineering

View full text Add to dashboard Cite

A combined‐cycle engine has two or more operating modes with a single flowpath. The motivation behind a combined‐cycle engine is to extend the engine's operating envelope and attain higher average performance. Several combined‐cycle engines and a combined engine system are presented. The rocket‐based combined‐cycle (RBCC) engine is a combination of a rocket engine and a ramjet engine. RBCC has wide operating range and structural simplicity, since there are no rotating parts. The drawback is a relatively lower specific impulse in the subsonic and transonic range. RBCC is suitable for the single‐stage‐to‐orbit (SSTO) vehicle due to its operability in low ambient pressure conditions and in space. The liquid air cycle engine (LACE) liquefies air using cryogenic propellants to reduce the onboard oxygen requirement. The advantages of LACE are reduced engine weight and wide operating conditions. However, owing to the low liquefaction efficiency of air, LACE suffers from low specific impulse and high fuel consumption. The turbo‐ramjet (TRE) and the air‐turbo‐rocket (ATR) engines employ turbocompressors to compress the airflow like in turbojet engines. Despite the advantage of increased specific impulse, both engines have low thrust to weight ratios. The dual‐mode scramjet engine like the RBCC has no moving parts. The combustion is subsonic in the ramjet mode and supersonic in the scramjet mode. The combination engine system, which mounts several engines on a vehicle, extends the operating range of the vehicle by operating appropriate engines according to the flight conditions.

show abstract

Design of Sub-scale Rocket-Ramjet Combined Cycle E...

Cited by 13 publications

References 9 publications

Sea-Level Static Tests of Rocket–Ramjet Combined Cycle Engine Model

Sea-Level Static Tests of Rocket–Ramjet Combined Cycle Engine Model

Analytical Method for Prediction of Suction Performance of Ejector-Jet

Combined‐Cycle Engines

Contact Info

Product

Resources

About