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What are aerospike nozzles?
Aerospike Nozzle The aerospike nozzle is a bell nozzle with its nozzle profile turned inside out. Flow of combustion gases is directed radially inward towards the nozzle axis. In the annular aerospike nozzle, flow issues from an annulus at a diameter located some radial distance from the nozzle axis.
What is true about the difference between a bell nozzle and an aerospike?
In a bell nozzle, the exit pressure of the working gases are fixed by the nozzle geometry. With an aerospike nozzle, since there is no hard outer surface in which the gases expand, the gas expansion varies to match the current atmospheric pressure at all altitudes.
How do aerospike nozzles work?
The idea behind the aerospike design is that at low altitude the ambient pressure compresses the exhaust against the spike. Exhaust recirculation in the base zone of the spike can raise the pressure in that zone to nearly ambient. The thrust at the base part of the nozzle can be ignored at low altitude.
What is the use of aerospike?
Aerospike is an excellent database for a recommendation engine. Key features are large lists ( for efficiently recording behavior), optimized Flash support to handle datasets from terabytes to petabytes, queries and aggregations for real-time reporting, and strong support for languages such as Python and Go.
Why are aerospike engines not used?
In aerospike the pressure (and temperature) of the gas remains very high all along the spike surface, and the sharp tip leaves very little room for cooling systems. 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.
Which is better Aerospike or Redis?
Aerospike is slightly faster than Redis for 100/0 and 80/20 read/write workloads against a single node backed by EBS SSD (gp2) storage for persistence.