The　impact　of　ethane　(C2H6)　addition　to　ignition　delay　of　dimethyl　ether　(DME)　under　high-temperature　conditions　is　opposite　to　that　of　other　small　molecule　alkanes,　but　the　trend　is　still　unclear　under　low-temperature　conditions.　Thus,　ignition　delays　of　DME/C2H6　mixtures　(C2H6　blending　ratio　ranging　from　0%　to　70%)　were　measured　at　temperatures　of　624-913　K,　pressures　of　9-35　bar,　equivalence　ratios　of　0.5-1　and　dilution　ratios　of　4　and　5.5　using　a　rapid　compression　machine.　Chemical　kinetic　simulations　were　further　carried　out　using　the　NUI　Aramco　Mech　2.0,　and　a　good　agreement　between　experimental　and　simulation　results　was　demonstrated.　Results　show　that　DME/C2H6　mixtures　exhibit　two-stage　ignition　and　negative　temperature　coefficient　(NTC)　characteristics.　The　ignition　delays　DME/C2H6　mixtures　decrease　with　increasing　pressure,　decreasing　dilution　ratio　and　increasing　equivalence　ratio,　and　the　ignition-promoting　effects　become　more　prominent　in　the　NTC　region　compared　to　the　lower　temperature　region.　Unlike　the　addition　of　C2H6　to　DME　at　high　temperatures,　it　appears　anomalous　behavior　with　other　small　molecule　alkanes,　and　the　addition　of　C2H6　at　low　temperatures　nonlinearly　increases　the　ignition　delay　especially　at　lower　pressures,　which　is　consistent　with　that　of　other　small　molecule　alkanes.　Kinetic　analysis　indicates　that　the　addition　of　C2H6　to　DME　reduces　the　low-temperature　chain-branching　routes　and　more　fuel　molecule　undergoes　chain　propagation　ones.　In　the　DME/C2H6　binary　mixtures,　the　oxidation　of　DME　is　inhibited　while　that　of　C2H6　is　promoted　and　even　exhibits　two-stage　characteristics,　which　is　due　to　their　competition　for　OH　radicals　dominantly　produced　by　low-temperature　chain-branching　of　DME.　On　the　whole,　the　consumption　of　overall　fuel　is　inhibited　with　C2H6　addition,　leading　to　less　OH　radicals　and　heat　release　accumulated　during　the　low-temperature　oxidation　and　thus　longer　ignition　delays.