The consequence of jet interacting with a warped disc
  The sprinkler pivots on a bearing on top of its threaded attachment nut. It is driven in a circular motion by a spring-loaded arm pushed back by the water stream which returns to "impact" the stream. The water stream can thus rotate around a fix axis. Analogously in our universe, the outflow or jet formed by the relativistic plasma corresponds to the water stream of a sprinkler; and the baryons in the tilted outer accretion disc or torus play the role of "impact arm". Then the jet aligning with the inner parts of a warped disc can directly "touch" the outer region of the disc. The resultant collision between such rapid leptons and slow baryons automatically accounts for the main features of broad-line region of active galactic nuclei. Moreover, it naturally provides a channel of dissipating the angular momentum of an accretion disc, which has long been a problem in theory of accretion disc. 
S. F. Zou and B. P. Gong
astro-ph.GA astro-ph.HE