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Unstart

In supersonic aerodynamics, an unstart refers to a generally violent breakdown of the supersonic airflow. The phenomenon occurs when mass flow rate changes significantly within a duct. Avoiding unstarts is a key objective in the design of the engine air intakes of supersonic aircraft that cruise at speeds in excess of Mach 2.2.

Art, In aircraft engine intakes & Etymology

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Overview

Etymology

In aircraft engine intakes

Theoretical basis

Shock instability or buzz

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Map overview Semantic statistics

Unstart

Nodes29
Edges28
Triples40
Avg. degree1.93
Density0.068966
Components1

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Unstart

Top relations

related to In aircraft engine intakes · 17
Unstart → As, At, B-1 Lancer, Few, If, Mach, Mixed, Most, North American XB-70 Valkyrie, Other, SSM-N-9 Regulus II, The, The Lockheed SR-71 Blackbird, These, This, Vought F-8 Crusader III, XB-70 Valkyrie
related to Avoidance · 7
Unstart → Decelerating, Mach, The, The SR-71, This, Thrust, XB-70
related to Theoretical basis · 7
Unstart → Instead, That, The, There, This, Unsteady, Using
related to Etymology · 4
Unstart → AD, In, Starting, The
related to Intentional · 4
Unstart → SR-71, The, This, When
is a · 1
Unstart → supersonic choking phenomenon that occurs in ducts with an upstream mass flow greater than the downstream mass flow

Important terminology Word statistics

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Important terminology

supersonic intake shock mach intakes aircraft compression flow duct engine inside external speed internal downstream cause upstream air cruise speeds

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Unstartis asupersonic choking phenomenon that occurs in ducts with an upstream mass flow greater than the downstream mass flow0.90text
Unstartrelated to AvoidanceDecelerating0.60section
Unstartrelated to AvoidanceMach0.60section
Unstartrelated to AvoidanceThe SR-710.60section
Unstartrelated to AvoidanceThrust0.60section
Unstartrelated to AvoidanceXB-700.60section
Unstartrelated to AvoidanceThis0.60section
Unstartrelated to AvoidanceThe0.60section
Unstartrelated to EtymologyThe0.60section
Unstartrelated to EtymologyStarting0.60section
Unstartrelated to EtymologyIn0.60section
Unstartrelated to EtymologyAD0.60section

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    Min side: 3
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