@inproceedings{14cb33109e794133bfdf8dae5f7a6cdd,
title = "Combining liquid air cycles with turbine engines for RLVS",
abstract = "Synergetic relationships between liquid-air cycle systems and turbine engines are considered for use in reusable launch vehicles, and it is shown that several benefits can be realized. The concept of in-flight air liquefaction was first developed in the late 1950s as the Liquid Air Cycle Engine (LACE). This paper extends the LACE concept to a LANCCE concept for propulsion in the Mach 3-7 range, using air liquefaction combined with zeotropic air separation. The paper describes the LANCCE/turbine architecture, presents typical performance calculations based on a spreadsheet model, and gives weight estimates for the major components of a low-cost orbital RLV. A payload of 14 MT is predicted for a 280 MT takeoff mass. Cost estimates are given based on an empirical cost model and predict $2600/kg to orbit, an order-of-magnitude improvement over the space shuttle. The need for lightweight air liquefaction heat exchangers is discussed, and preliminary experimental studies on advanced compact heat exchangers are described.",
author = "Sebens, {Jeremy M.} and Burton, {Rodney L.} and Jacobi, {Anthony M.} and Brown, {Kevin A.} and Michna, {Gregory J.}",
year = "2003",
doi = "10.2514/6.2003-6934",
language = "English (US)",
isbn = "9781624100857",
series = "12th AIAA International Space Planes and Hypersonic Systems and Technologies",
publisher = "American Institute of Aeronautics and Astronautics Inc.",
booktitle = "12th AIAA International Space Planes and Hypersonic Systems and Technologies",
note = "12th AIAA International Space Planes and Hypersonic Systems and Technologies 2003 ; Conference date: 15-12-2003 Through 19-12-2003",
}