We　introduce　an　improved　design　of　the　X-type　lattice　cored　ventilated　brake　disc　proposed　in　a　previous　study.　Several　annular　sector　X-type　lattice　components　are　integrated　into　the　ventilated　channel.　Detailed　thermo-fluidic　characteristics　of　this　new　brake　disc　are　explored　by　experiments　and　numerical　simulations.　Experimental　results　reveal　that　the　new　brake　disc　exhibits　better　thermal　uniformity　than　the　preliminary　X-type　brake　disc,　leading　to　approximately　uniform　reduction　of　rubbing　surface　temperature　relative　to　a　prevalent　radial　vane　brake　disc.　Within　the　typical　operating　range　of　a　passenger　vehicle　(i.e.,　200-1000　RPM),　the　new　brake　disc　provides　18-21%　and　7-17%　higher　steady-state　overall　cooling　capacity　than　the　radial　vane　and　preliminary　X-type　brake　discs,　respectively.　Numerical　results　reveal　that　replacement　of　radial　vanes　by　the　X-type　lattice　reduces　pumping　capacity　by　approximately　40%,　deteriorating　therefore　local　heat　transfer　on　the　inner　surface,　the　outer　rim　surface,　the　inner　rim　surface　and　the　rubbing　surface　of　the　rubbing　discs.　However,　the　unique　topology　of　the　X-type　lattice　results　in　successive　interruption　and　redevelopment　of　flow　and　thermal　boundary　layers,　flow　impingement　on　upstream　surface　of　each　ligament,　and　stronger　flow　mixing　in　conjunction　with　an　enlarged　core　surface　area.　Hence,　heat　transfer　on　core　surface　is　substantially　improved,　which　acts　as　the　dominant　mechanism　for　enhanced　overall　cooling　performance　of　the　new　brake　disc.　(C)　2016　Elsevier　Masson　SAS.　All　rights　reserved.