Fig.1

Structure of detonation wave and cell distribution［2］

Fig.2

Flame acceleration and deflagration to detonation transition［3］

Fig.3

Comparison of idealized thermodynamic cycles for constant pressure， constant volume， and detonation modes of combustion［6］

Fig.4

Typical application of rotating detonation［18-19］

Fig.5

Injection scheme and corresponding numerical simulation

Fig.6

Some special injection schemes

Fig.7

Detonation cellular structure in quenching process［33］

Fig.8

Effects of ignition method and mass flow rate on initiation time in a plane-radial combustor［52］

Fig.9

A schematic diagram of wall-detached rotating detonation wave［60］

Fig.10

Typical realization approaches of liquid kerosene rotating detonation

Fig.11

Typical results of rotating detonation in an annular cavity-based combustor

Fig.12

Effect of normalized perimeter on detonation waves［81］

Fig.13

Flowfield structure of rotating detonation wave （Series I show the 2D flowfield of rotating detonation wave， （a） gas temperature with n-C7H16 droplets， （b） n-C7H16 vapor mass fraction， （c） pressure， （d） magnitude of pressure gradient［101］； Series II show the 3D flowfield of rotating detonation wave， the corresponding locations of the contours from top to bottom are outer wall， midchannel， and cutting plane 2 cm from the chamber bottom， respectively［103］）

Fig.14

Optical observation of rotating detonation wave through side window

Fig.15

OH-PLIF optical observation of rotating detonation［25］

Fig.16

Detonation structure shown through velocity measurements［118］

Fig.17

Distinction between rotating detonation wave and sawtooth wave［133］

Fig.18

Instantaneous flow fields within one instability cycle of the spinning mode［135］

Fig.19

Rocket-based rotating detonation engine and experiments in University of Central Florida［139］

Fig.20

Ground experiment and flight demonstration of detonation engine system using sounding rocket［141-142］

Fig.21

Progress of ramjet-based rotating detonation engine in Russia［144，146］

Fig.22

Free jetexperiment of ramjet-based rotating detonation engine［16］

Fig.23

Flight demonstration of ramjet-based rotating detonation engine［149］

Fig.24

Research facility of rotating detonation engine and T63［154］

Fig.25

Free jet experiment of hydrogen ramjet-based rotating detonation engine

Fig.26

Free jet experiment of kerosene ramjet-based rotating detonation aircraft