Aerospike nozzles are rather unique, in that they are somewhat of a reverse version of the standard bell nozzle. Instead of using a shroud to contain the exit flow. Abstract- Aerospike nozzles are being considered in the development of the Single Stage to Orbit launching vehicles because of their prominent features and . With a bell nozzle, you have a minor part of rapidly expanding(+cooling) exhaust touching the broad, actively cooled nozzle – that means little.

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Aerospike length from origin Lnozzle. This angle is used to compute the slope of the first characteristic from the edge of the throat. This results in a smoothly varying exit flow area which is always optimized as back-pressure changes. Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

This rocket was designed to test several components of their Haas 2CA at a lower cost.

Aerospike Nozzle and Minimum Length Nozzle Design

Note the ablative aerospike nozzle entry-cone that forms the combustion chamber. JCRM 3, 2 10 The Mach number at each point in the flow is determined from the Prandtl-Meyer function using the Newton-Raphson iteration method and the unit processes dictated by the method of characteristics.

Selected from a pull-down menu or user-defined. The remaining expansion fan is divided into six increments. I admire Arcaspace’s enthusiasm, but it is Dunning-Kruger in action.

This causes the thrust-generating exhaust to begin to expand outside the edge of the bell. The Nozzpe was to power the VentureStar single-stage-to-orbit vehicle.

As a by product of the oblique shock wave analysis AeroSpike determines the shock wave angle for overexpanded flow and plots both the outer boundary contour and the initial shock wave from the lip of the cowl.

You have a lot of extra-hot, very dense gas in contact with the narrow spike that must pass all the coolant and dissipate the heat somehow, not to melt. In the linear aerospike the spike consists of a tapered wedge-shaped plate, with exhaust exiting on either side at the “thick” end.


The vehicle also was to have had lightweight components and fuel tanks nnozzle to conform to aaerospike vehicle’s outer shape. Nathan Tuggy 3, 4 25 This page was last edited on 5 Novemberat In SE, answers should be able to stand on their own after links break, so link-only answers are not considered helpful. AeroCFD analysis of an aerospike rocket.

The Aerospike Nozzle – Rocketschnozzles

Only the ratio of specific heats are required for the MLN analysis. All important flow properties are displayed in real time as the locator moves from point to point in the flow field described by the characteristic mesh.

This may be slightly reminiscent to the current non-use of Thorium based nuclear powerthough that is also related to the aefospike for nuclear weapons development. Exploded view of the aerospike rocket motor. The recirculation zone at the base of the spike maintains the pressure in that zone to a fraction of 1 barhigher than the near-vacuum in front of the vehicle, thus giving extra thrust as altitude increases.

In the Aerospike Nozzle Data section added a display of Truncation as percent of total aerospike length.

However, the user can over-ride the inserted ratio of specific heats by simply inserting his own ratio of specific heats in the data entry box. So it must be cooled which is difficult. By using this site, you agree to the Aeroxpike of Use and Privacy Policy.

The ratio of specific heats has already been specified from the main screen selection.

Finally, check the Check to Include base thrust check box to include base thrust for the determination of total thrust and thrust coefficient CF for truncated aerospike nozzles. Added the ability to include base thrust for truncated aerospike nozzles. Figure-9, XRS aerospike rocket engine description data repeated in Figure Travis Bear 1 4 However, sometimes a sharp corner at the throat may be impractical. The terminology in the literature surrounding this subject is somewhat confused—the term aerospike was originally used for a truncated plug nozzle with a very rough conical taper and some gas injection, forming an “air spike” to help make up for the absence of the plug tail.


A number of inert gases, liquid propellants and solid fuel propellants are available. Post as a guest Name. Nozzle Shapes – The Aerospike Nozzle. Requires QuickTime from Apple.

Aerospike engine

Since the pressure aerospjke front of the vehicle is ambient, this means that the exhaust at the base of the spike nearly balances out with the drag experienced by the vehicle. Design Mach number Mdesign: When checked this check box activates base pressure computation for truncated aerospike nozzles where base pressure is included for determination of total aerospike thrust and thrust coefficient.

Click the UpDown command button to move a locator from point to point in the flow field. Their focused on small payload SSTOs for now. The first of which is the toroidal aerospike. The thrust at the base part of the nozzle can be ignored at low altitude. Define the angle the sonic section of the thruster makes with the axis of the aerospike nozzle. Please nkzzle a reason or a talk parameter to this template to explain the issue with the article.

Dec 4 ’17 at Please help improve it or discuss these issues on the talk page. Specify whether the nozzle is 2-D or 3-D by clicking either the 2-D characteristics or 3-D approximation option buttons.

A new company, Firefly Aerospacehas replaced the aerospike engine with a conventional engine in the Alpha 2. I wonder if they will reuse the engines by parachuting them down or if they might aerospkke after vertical landings in future?

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