• Facets (new session)
• Description
• Metadata
• Settings
  • Rule: ActivityStreamsMapasEquivalentb3sb3sifpdbprdf-labelfacetshttp://dbpedia.org/resource/inference/rules/dbpedia#http://dbpedia.org/resource/inference/rules/opencyc#http://dbpedia.org/resource/inference/rules/umbel#http://dbpedia.org/resource/inference/rules/yago#http://dbpedia.org/schema/property_rules#http://www.ontologyportal.org/inference/rules/SUMO#http://www.ontologyportal.org/inference/rules/WordNet#http://www.w3.org/2002/07/owl#ldpoplwebskos-transurn:det:rdf:labelvirtrdf-labelvirtrdf-urlNone
    
  • Inverse Functional Properties: Disabled (fastest) Apply to subjects only Apply to objects only Apply to both subjects and objects
  • "Same As": Disabled (fastest) Apply to subjects only Apply to objects only Apply to both subjects and objects (recommended) Apply to subjects, objects and predicates (not recommended on big datasets) Apply to predicates only (special use cases only)

About: Gun tunnel     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : owl:Thing, within Data Space : dbpedia.demo.openlinksw.com associated with source document(s)

A gun tunnel is an intermediate altitude hypersonic wind tunnel that can be configured to produce hypersonic flows at roughly 30 to 40 km altitude. This uses a piston for isentropic compression. The hypersonic facility at IISC Bangalore, India has a high enthalpy gun tunnel, which can produce Schlieren imaging and produce up to 8 megajoules of energy. Using a piston can be very tricky due to reflecting of shocks. At the facility, they use aluminium diaphragm to produce shocks and paper diaphragm to avoid shocks and pass through the hypersonic chamber. The pressure used is significantly higher like 30 times the atmosphere.