pulsejet /ˈpʌlsˌdʒɛt/

• 1. 

  N a type of ramjet engine in which air is admitted through movable vanes that are closed by the pressure resulting from each intermittent explosion of the fuel in the combustion chamber, thus causing a pulsating thrust 脉动式喷气发动机 (Also called pulsejet engine, pulsojet)