Cooling system for an aircraft , comprising a heat exchanger for cooling a hot fluid with cooling air, comprising a cooling air inlet in fluid communication with a cooling air outlet and a hot fluid inlet in fluid communication with a hot fluid outlet by means of a plurality of hot fluid conduits , wherein the plurality of hot fluid conduits are configured to transfer heat between a flow of hot fluid flowing between the hot fluid inlet and the hot fluid outlet , and a flow of cooling air flowing between the cooling air inlet and the cooling air outlet ; an air intake for the supply of cooling air from outside of the cooling system to the heat exchanger , wherein the air intake is in fluid communication with the cooling air inlet of the heat exchanger ; and a Coand -effect air amplifier comprising an air amplifier inlet, an air amplifier outlet, a pressurized air inlet and a pressurized air outlet configured as a nozzle , the Coand -effect air amplifier being adapted to create a flow of cooling air between the air amplifier inlet and the air amplifier outlet induced by a stream of pressurized air injected through the nozzle , wherein the air amplifier inlet is in fluid communication with the cooling air outlet of the heat exchanger , wherein the plurality of hot fluid conduits are arranged in a tubular configuration defining a hollow interior volume, and wherein the cooling air flows between the hot fluid conduits and through the hollow interior volume of the tubular configuration of the hot fluid conduits . a heat exchanger for cooling a hot fluid with cooling air, comprising a cooling air inlet in fluid communication with a cooling air outlet and a hot fluid inlet in fluid communication with a hot fluid outlet by means of a plurality of hot fluid conduits , wherein the plurality of hot fluid conduits are configured to transfer heat between a flow of hot fluid flowing between the hot fluid inlet and the hot fluid outlet , and a flow of cooling air flowing between the cooling air inlet and the cooling air outlet ; a cooling air inlet in fluid communication with a cooling air outlet and a hot fluid inlet in fluid communication with a hot fluid outlet by means of a plurality of hot fluid conduits , wherein the plurality of hot fluid conduits are configured to transfer heat between a flow of hot fluid flowing between the hot fluid inlet and the hot fluid outlet , and a flow of cooling air flowing between the cooling air inlet and the cooling air outlet ; an air intake for the supply of cooling air from outside of the cooling system to the heat exchanger , wherein the air intake is in fluid communication with the cooling air inlet of the heat exchanger ; and a Coand -effect air amplifier comprising an air amplifier inlet, an air amplifier outlet, a pressurized air inlet and a pressurized air outlet configured as a nozzle , the Coand -effect air amplifier being adapted to create a flow of cooling air between the air amplifier inlet and the air amplifier outlet induced by a stream of pressurized air injected through the nozzle , wherein the air amplifier inlet is in fluid communication with the cooling air outlet of the heat exchanger , wherein the plurality of hot fluid conduits are arranged in a tubular configuration defining a hollow interior volume, and wherein the cooling air flows between the hot fluid conduits and through the hollow interior volume of the tubular configuration of the hot fluid conduits . <EOS>