Hydrogen　is　considered　the　optimal　solution　for　achieving　high　efficiency　and　low　emissions　in　Wankel　rotary　engines　(WREs).　This　paper　aims　to　reveal　the　effect　of　ignition　patterns　on　the　combustion　process　of　a　hydrogen-fueled　WRE.　The　results　show　that　the　combustion　rate　of　the　trailing　spark　plug　(TSP),　due　to　its　structural　similarity　with　the　passive　precombustion　chamber,　surpasses　that　of　the　leading　spark　plug　(LSP).　The　unidirectional　flow　field　promotes　the　forward　development　of　the　flame　of　TSP　but　inhibits　the　backward　development　of　the　flame　of　LSP.　Moreover,　the　recess　in　combustion　chamber　facilitates　flame　propagation　of　TSP.　Asynchronous　ignition　mode　exhibits　a　higher　indicated　thermal　efficiency　(ITE)　than　synchronous　ignition　mode,　facilitating　effective　control　of　the　combustion　phase.　When　the　ignition　timing　of　LSP　is　delayed,　and　TSP　is　earlier,　the　flame　of　TSP　exceeds　LSP,　resulting　in　unchanged　ITE.　When　the　ignition　timing　of　TSP　is　delayed,　and　LSP　is　earlier,　the　peak　of　free　radicals　and　burned　volume　rate　are　the　highest,　resulting　in　a　faster　combustion　rate.　It　is　recommended　that　the　LSP　ignition　timing　is　set　earlier　for　practical　operations.　©　2024