The presence of bubbles in a turbulent flow changes the flow drastically and enhances the mixing. Adding salt to the bubbly aqueous flow changes the bubble coalescence properties as compared to regular demineralized water. Here we provide direct experimental evidence that also the turbulent thermal energy spectra are strongly changed. Experiments were performed in the Twente Mass and Heat Transfer water tunnel, in which we can measure the thermal spectra in bubbly turbulence in salty water. We find that the mean bubble diameter decreases with increasing concentration of salt (NaCl), due to the inhibition of bubble coalescence. With increasing salinity, the transition frequency from the classical $-5/3$ scaling of the thermal energy spectrum to the bubble induced $-3$ scaling shifts to higher frequencies, thus enhancing the overall thermal energy. We relate this frequency shift to the smaller size of the bubbles for the salty bubbly flow. Finally we measure the heat transport in the bubbly flow, and show how it varies with changing void fraction and salinity: Increases in both result into increases in the number of extreme events.

湍流中气泡的存在会极大地改变流动并增强混合。与常规软化水相比，向气泡水流中添加盐会改变气泡聚结特性。在这里，我们提供了直接的实验证据，表明湍流热能谱也发生了强烈变化。实验在特温特传质传热水隧道中进行，我们可以在其中测量咸水中气泡湍流的热谱。我们发现，由于气泡聚结的抑制，平均气泡直径随着盐（NaCl）浓度的增加而减小。随着盐度的增加，经典的转变频率$-5/3$热能谱与气泡诱导的比例缩放$-3$缩放转向更高的频率，从而增强整体热能。我们将这种频移与咸味气泡流中气泡的较小尺寸联系起来。最后，我们测量了气泡流中的热传递，并展示了它如何随着空隙率和盐度的变化而变化：两者的增加都会导致极端事件数量的增加。